- Added solutions by Ulrich Rieke.

13 files changed, 967 insertions, 883 deletions

diff --git a/challenge-060/ulrich-rieke/raku/ch-1.p6 b/challenge-060/ulrich-rieke/raku/ch-1.p6
new file mode 100644
index 0000000000..03cd3ca021
--- /dev/null
+++ b/challenge-060/ulrich-rieke/raku/ch-1.p6
@@ -0,0 +1,37 @@
+use v6 ;
+
+sub number_to_Excel( Int $n --> Str ) {
+  if ( $n > 16384 ) {
+      return "Error" ;
+  }
+  if ( $n < 27 ) {
+      return ( $n + 64).chr ;
+  }
+  else {
+      my $totals = $n div 26 ;
+      my $rest = $n % 26 ;
+      return ( "A" xx $totals ).join ~ ( $rest + 64).chr ;
+  }
+}
+
+sub excel_to_number( Str $column --> Int ) {
+  if ( $column.chars == 1 ) {
+      return $column.ord - 64 ;
+  }
+  else {
+      my $len = $column.chars ;
+      return ( 26 * ( $len - 1 ) + $column.substr( $len - 1 , 1).ord
+        - 64 ) ;
+  }
+}
+
+sub MAIN( *@ARGV ) {
+  for @ARGV -> $arg {
+      if ( $arg ~~ /\d+/ ) {
+    say "$arg : {number_to_Excel( $arg ) } !" ;
+      }
+      else {
+    say "$arg : {excel_to_number( $arg ) } !" ;
+      }
+  }
+}
diff --git a/challenge-060/ulrich-rieke/raku/ch-2.p6 b/challenge-060/ulrich-rieke/raku/ch-2.p6
new file mode 100644
index 0000000000..7151fb1776
--- /dev/null
+++ b/challenge-060/ulrich-rieke/raku/ch-2.p6
@@ -0,0 +1,32 @@
+use v6 ;
+
+#finds all possible combinations of numbers of the given length in the
+#array, by using the combinations method and by adding repetitions of
+#the numbers in the array
+sub createCombinations( @array, $l ) {
+  my @numbers ;
+  my $len = @array.elems ;
+  for (0..$len - 1 ) -> $i {
+      @numbers.push( (@array[ $i ] xx $l).join ) ;
+  }
+  my @combinations = @array.combinations( $l ).map( {.join} ) ;
+  my @reversed = @combinations.map( {.flip} ) ;
+  @numbers.push( @combinations.shift) while @combinations ;
+  @numbers.push( @reversed.shift ) while @reversed ;
+  return @numbers.grep( {$_.chars == $l} ) ;
+}
+
+sub MAIN( *@ARGV ) {
+  my $len = @ARGV.elems ;
+  my @array = @ARGV[0..$len - 3 ] ;
+  my $x = @ARGV[ *-2].Int ;
+  my $y = @ARGV[ *-1 ].Int ;
+  if ( $x > @ARGV[*-1].chars ) {
+      say "cannot solve this! The smallest {$x}-digit number is greater than $y!" ;
+      exit 1 ;
+  }
+  my @numbercombinations = createCombinations( @array, $x ) ;
+  my @valid = @numbercombinations.grep( {$_ !~~ /^0+/ } ) ;
+  my @solution = @valid.map( {.Int}).grep( {$_ < $y} ).sort ;
+  say @solution ;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 912c25e732..5aab5010a4 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,19 +1,11 @@
 {
-   "subtitle" : {
-      "text" : "[Champions: 8] Last updated at 2020-05-11 21:05:09 GMT"
-   },
-   "xAxis" : {
-      "type" : "category"
-   },
    "series" : [
       {
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 060",
          "data" : [
             {
                "name" : "Javier Luque",
-               "drilldown" : "Javier Luque",
-               "y" : 5
+               "y" : 5,
+               "drilldown" : "Javier Luque"
             },
             {
                "drilldown" : "Luca Ferrari",
@@ -22,13 +14,13 @@
             },
             {
                "name" : "Markus Holzer",
-               "drilldown" : "Markus Holzer",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Markus Holzer"
             },
             {
-               "name" : "Mohammad S Anwar",
                "y" : 2,
-               "drilldown" : "Mohammad S Anwar"
+               "drilldown" : "Mohammad S Anwar",
+               "name" : "Mohammad S Anwar"
             },
             {
                "name" : "Roger Bell_West",
@@ -36,50 +28,52 @@
                "drilldown" : "Roger Bell_West"
             },
             {
-               "name" : "Sangeet Kar",
+               "drilldown" : "Sangeet Kar",
                "y" : 2,
-               "drilldown" : "Sangeet Kar"
+               "name" : "Sangeet Kar"
             },
             {
-               "name" : "Wanderdoc",
+               "name" : "Ulrich Rieke",
                "y" : 2,
-               "drilldown" : "Wanderdoc"
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Wanderdoc",
+               "name" : "Wanderdoc"
             },
             {
                "name" : "Yet Ebreo",
-               "drilldown" : "Yet Ebreo",
-               "y" : 2
+               "y" : 2,
+               "drilldown" : "Yet Ebreo"
             }
-         ]
+         ],
+         "name" : "Perl Weekly Challenge - 060",
+         "colorByPoint" : 1
       }
    ],
+   "subtitle" : {
+      "text" : "[Champions: 9] Last updated at 2020-05-11 21:37:05 GMT"
+   },
    "title" : {
       "text" : "Perl Weekly Challenge - 060"
    },
+   "tooltip" : {
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "followPointer" : 1,
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "tooltip" : {
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "followPointer" : 1,
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>"
-   },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
-      }
+   "xAxis" : {
+      "type" : "category"
    },
    "drilldown" : {
       "series" : [
          {
-            "id" : "Javier Luque",
-            "name" : "Javier Luque",
             "data" : [
                [
                   "Perl",
@@ -93,7 +87,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Javier Luque",
+            "id" : "Javier Luque"
          },
          {
             "name" : "Luca Ferrari",
@@ -110,13 +106,13 @@
             "id" : "Luca Ferrari"
          },
          {
-            "name" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
+            "name" : "Markus Holzer",
             "id" : "Markus Holzer"
          },
          {
@@ -130,6 +126,7 @@
             ]
          },
          {
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -140,28 +137,37 @@
                   2
                ]
             ],
-            "name" : "Roger Bell_West",
-            "id" : "Roger Bell_West"
+            "name" : "Roger Bell_West"
          },
          {
             "id" : "Sangeet Kar",
-            "name" : "Sangeet Kar",
             "data" : [
                [
                   "Perl",
                   2
                ]
+            ],
+            "name" : "Sangeet Kar"
+         },
+         {
+            "id" : "Ulrich Rieke",
+            "name" : "Ulrich Rieke",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
             ]
          },
          {
-            "id" : "Wanderdoc",
-            "name" : "Wanderdoc",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Wanderdoc",
+            "id" : "Wanderdoc"
          },
          {
             "data" : [
@@ -180,5 +186,14 @@
    },
    "legend" : {
       "enabled" : 0
+   },
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
    }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 37fb614774..a04b530ff8 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,12 +1,18 @@
 {
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
+         }
+      },
+      "type" : "category"
    },
    "yAxis" : {
-      "min" : 0,
       "title" : {
          "text" : null
-      }
+      },
+      "min" : 0
    },
    "legend" : {
       "enabled" : "false"
@@ -15,19 +21,22 @@
       "type" : "column"
    },
    "subtitle" : {
-      "text" : "Last updated at 2020-05-11 21:05:09 GMT"
-   },
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      }
+      "text" : "Last updated at 2020-05-11 21:37:05 GMT"
    },
    "series" : [
       {
+         "dataLabels" : {
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "align" : "right",
+            "enabled" : "true",
+            "y" : 10,
+            "format" : "{point.y:.0f}",
+            "color" : "#FFFFFF",
+            "rotation" : -90
+         },
          "data" : [
             [
                "Blog",
@@ -39,24 +48,15 @@
             ],
             [
                "Raku",
-               1578
+               1580
             ]
          ],
-         "name" : "Contributions",
-         "dataLabels" : {
-            "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
-            },
-            "y" : 10,
-            "color" : "#FFFFFF",
-            "enabled" : "true",
-            "align" : "right",
-            "format" : "{point.y:.0f}",
-            "rotation" : -90
-         }
+         "name" : "Contributions"
       }
    ],
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
+   },
    "title" : {
       "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 46b389448b..851ca4544f 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,12 +1,322 @@
 {
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
+   "tooltip" : {
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
+      "followPointer" : "true"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
+   },
+   "series" : [
+      {
+         "colorByPoint" : "true",
+         "name" : "Perl Weekly Challenge Languages",
+         "data" : [
+            {
+               "y" : 142,
+               "drilldown" : "001",
+               "name" : "#001"
+            },
+            {
+               "y" : 109,
+               "drilldown" : "002",
+               "name" : "#002"
+            },
+            {
+               "name" : "#003",
+               "drilldown" : "003",
+               "y" : 71
+            },
+            {
+               "name" : "#004",
+               "drilldown" : "004",
+               "y" : 91
+            },
+            {
+               "y" : 72,
+               "drilldown" : "005",
+               "name" : "#005"
+            },
+            {
+               "drilldown" : "006",
+               "y" : 52,
+               "name" : "#006"
+            },
+            {
+               "name" : "#007",
+               "drilldown" : "007",
+               "y" : 59
+            },
+            {
+               "drilldown" : "008",
+               "y" : 72,
+               "name" : "#008"
+            },
+            {
+               "y" : 68,
+               "drilldown" : "009",
+               "name" : "#009"
+            },
+            {
+               "name" : "#010",
+               "drilldown" : "010",
+               "y" : 60
+            },
+            {
+               "name" : "#011",
+               "drilldown" : "011",
+               "y" : 79
+            },
+            {
+               "name" : "#012",
+               "drilldown" : "012",
+               "y" : 83
+            },
+            {
+               "y" : 76,
+               "drilldown" : "013",
+               "name" : "#013"
+            },
+            {
+               "name" : "#014",
+               "drilldown" : "014",
+               "y" : 96
+            },
+            {
+               "name" : "#015",
+               "drilldown" : "015",
+               "y" : 93
+            },
+            {
+               "name" : "#016",
+               "drilldown" : "016",
+               "y" : 66
+            },
+            {
+               "drilldown" : "017",
+               "y" : 79,
+               "name" : "#017"
+            },
+            {
+               "drilldown" : "018",
+               "y" : 76,
+               "name" : "#018"
+            },
+            {
+               "y" : 97,
+               "drilldown" : "019",
+               "name" : "#019"
+            },
+            {
+               "name" : "#020",
+               "drilldown" : "020",
+               "y" : 95
+            },
+            {
+               "name" : "#021",
+               "y" : 67,
+               "drilldown" : "021"
+            },
+            {
+               "drilldown" : "022",
+               "y" : 63,
+               "name" : "#022"
+            },
+            {
+               "y" : 91,
+               "drilldown" : "023",
+               "name" : "#023"
+            },
+            {
+               "y" : 70,
+               "drilldown" : "024",
+               "name" : "#024"
+            },
+            {
+               "name" : "#025",
+               "y" : 55,
+               "drilldown" : "025"
+            },
+            {
+               "y" : 70,
+               "drilldown" : "026",
+               "name" : "#026"
+            },
+            {
+               "name" : "#027",
+               "drilldown" : "027",
+               "y" : 58
+            },
+            {
+               "y" : 78,
+               "drilldown" : "028",
+               "name" : "#028"
+            },
+            {
+               "name" : "#029",
+               "drilldown" : "029",
+               "y" : 77
+            },
+            {
+               "name" : "#030",
+               "y" : 115,
+               "drilldown" : "030"
+            },
+            {
+               "name" : "#031",
+               "y" : 87,
+               "drilldown" : "031"
+            },
+            {
+               "name" : "#032",
+               "drilldown" : "032",
+               "y" : 92
+            },
+            {
+               "y" : 108,
+               "drilldown" : "033",
+               "name" : "#033"
+            },
+            {
+               "y" : 62,
+               "drilldown" : "034",
+               "name" : "#034"
+            },
+            {
+               "name" : "#035",
+               "drilldown" : "035",
+               "y" : 62
+            },
+            {
+               "drilldown" : "036",
+               "y" : 66,
+               "name" : "#036"
+            },
+            {
+               "name" : "#037",
+               "y" : 65,
+               "drilldown" : "037"
+            },
+            {
+               "drilldown" : "038",
+               "y" : 65,
+               "name" : "#038"
+            },
+            {
+               "drilldown" : "039",
+               "y" : 60,
+               "name" : "#039"
+            },
+            {
+               "drilldown" : "040",
+               "y" : 71,
+               "name" : "#040"
+            },
+            {
+               "y" : 74,
+               "drilldown" : "041",
+               "name" : "#041"
+            },
+            {
+               "name" : "#042",
+               "drilldown" : "042",
+               "y" : 88
+            },
+            {
+               "name" : "#043",
+               "drilldown" : "043",
+               "y" : 66
+            },
+            {
+               "name" : "#044",
+               "drilldown" : "044",
+               "y" : 82
+            },
+            {
+               "drilldown" : "045",
+               "y" : 94,
+               "name" : "#045"
+            },
+            {
+               "name" : "#046",
+               "drilldown" : "046",
+               "y" : 85
+            },
+            {
+               "y" : 82,
+               "drilldown" : "047",
+               "name" : "#047"
+            },
+            {
+               "drilldown" : "048",
+               "y" : 106,
+               "name" : "#048"
+            },
+            {
+               "name" : "#049",
+               "y" : 85,
+               "drilldown" : "049"
+            },
+            {
+               "y" : 96,
+               "drilldown" : "050",
+               "name" : "#050"
+            },
+            {
+               "name" : "#051",
+               "y" : 87,
+               "drilldown" : "051"
+            },
+            {
+               "name" : "#052",
+               "y" : 89,
+               "drilldown" : "052"
+            },
+            {
+               "drilldown" : "053",
+               "y" : 99,
+               "name" : "#053"
+            },
+            {
+               "name" : "#054",
+               "drilldown" : "054",
+               "y" : 99
+            },
+            {
+               "y" : 86,
+               "drilldown" : "055",
+               "name" : "#055"
+            },
+            {
+               "name" : "#056",
+               "y" : 93,
+               "drilldown" : "056"
+            },
+            {
+               "y" : 78,
+               "drilldown" : "057",
+               "name" : "#057"
+            },
+            {
+               "name" : "#058",
+               "drilldown" : "058",
+               "y" : 61
+            },
+            {
+               "name" : "#059",
+               "y" : 81,
+               "drilldown" : "059"
+            },
+            {
+               "y" : 25,
+               "drilldown" : "060",
+               "name" : "#060"
+            }
+         ]
       }
+   ],
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-05-11 21:37:05 GMT"
    },
    "drilldown" : {
       "series" : [
@@ -29,7 +339,7 @@
             "id" : "001"
          },
          {
-            "name" : "002",
+            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -44,9 +354,10 @@
                   10
                ]
             ],
-            "id" : "002"
+            "name" : "002"
          },
          {
+            "id" : "003",
             "name" : "003",
             "data" : [
                [
@@ -61,8 +372,7 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "003"
+            ]
          },
          {
             "data" : [
@@ -83,6 +393,7 @@
             "id" : "004"
          },
          {
+            "id" : "005",
             "name" : "005",
             "data" : [
                [
@@ -97,11 +408,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "005"
+            ]
          },
          {
-            "id" : "006",
             "name" : "006",
             "data" : [
                [
@@ -116,7 +425,8 @@
                   "Blog",
                   7
                ]
-            ]
+            ],
+            "id" : "006"
          },
          {
             "id" : "007",
@@ -137,6 +447,7 @@
             "name" : "007"
          },
          {
+            "id" : "008",
             "name" : "008",
             "data" : [
                [
@@ -151,8 +462,7 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "008"
+            ]
          },
          {
             "data" : [
@@ -173,6 +483,8 @@
             "id" : "009"
          },
          {
+            "id" : "010",
+            "name" : "010",
             "data" : [
                [
                   "Perl",
@@ -186,9 +498,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "010",
-            "id" : "010"
+            ]
          },
          {
             "id" : "011",
@@ -209,6 +519,7 @@
             ]
          },
          {
+            "id" : "012",
             "name" : "012",
             "data" : [
                [
@@ -223,12 +534,10 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "012"
+            ]
          },
          {
             "id" : "013",
-            "name" : "013",
             "data" : [
                [
                   "Perl",
@@ -242,7 +551,8 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "013"
          },
          {
             "id" : "014",
@@ -281,6 +591,7 @@
             "id" : "015"
          },
          {
+            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -295,11 +606,9 @@
                   12
                ]
             ],
-            "name" : "016",
             "id" : "016"
          },
          {
-            "id" : "017",
             "data" : [
                [
                   "Perl",
@@ -314,7 +623,8 @@
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@@ -335,7 +645,6 @@
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                   "Perl",
@@ -350,11 +659,11 @@
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                ]
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-            "name" : "019"
+            "name" : "019",
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-            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -368,10 +677,11 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
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                   "Perl",
@@ -386,7 +696,7 @@
                   10
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-            "name" : "021"
+            "id" : "021"
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          {
             "name" : "022",
@@ -407,7 +717,7 @@
             "id" : "022"
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-            "id" : "023",
+            "name" : "023",
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                   "Perl",
@@ -422,7 +732,7 @@
                   12
                ]
             ],
-            "name" : "023"
+            "id" : "023"
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          {
             "name" : "024",
@@ -443,6 +753,7 @@
             "id" : "024"
          },
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             "data" : [
                [
                   "Perl",
@@ -457,8 +768,7 @@
                   12
                ]
             ],
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-            "id" : "025"
+            "name" : "025"
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@@ -480,7 +790,6 @@
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             "data" : [
                [
                   "Perl",
@@ -494,10 +803,12 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "027"
          },
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             "id" : "028",
+            "name" : "028",
             "data" : [
                [
                   "Perl",
@@ -511,10 +822,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "028"
+            ]
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             "data" : [
                [
                   "Perl",
@@ -529,10 +840,10 @@
                   12
                ]
             ],
-            "name" : "029",
             "id" : "029"
          },
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             "data" : [
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                   "Perl",
@@ -547,12 +858,9 @@
                   10
                ]
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-            "id" : "030"
+            "name" : "030"
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-            "name" : "031",
             "data" : [
                [
                   "Perl",
@@ -566,10 +874,11 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
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+            "id" : "031"
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             "data" : [
                [
                   "Perl",
@@ -584,6 +893,7 @@
                   10
                ]
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+            "name" : "032",
             "id" : "032"
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@@ -623,7 +933,7 @@
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             "data" : [
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                   "Perl",
@@ -638,10 +948,9 @@
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-            "id" : "035"
+            "name" : "035"
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             "data" : [
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                   "Perl",
@@ -656,7 +965,8 @@
                   11
                ]
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+            "name" : "036",
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@@ -677,7 +987,6 @@
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             "data" : [
                [
@@ -692,11 +1001,10 @@
                   "Blog",
                   12
                ]
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             "data" : [
                [
                   "Perl",
@@ -710,11 +1018,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
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+            "id" : "039"
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                [
                   "Perl",
@@ -728,10 +1036,12 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
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+            "id" : "040"
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                   "Perl",
@@ -746,7 +1056,7 @@
                   9
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-            "id" : "041"
+            "name" : "041"
          },