- Added solutions by Laurent Rosenfeld.

16 files changed, 1155 insertions, 1004 deletions

diff --git a/challenge-057/laurent-rosenfeld/blog.txt b/challenge-057/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..3f1ad96331
--- /dev/null
+++ b/challenge-057/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+http://blogs.perl.org/users/laurent_r/2020/04/perl-weekly-challenge-57-tree-inversion-and-shortest-unique-prefix.html
diff --git a/challenge-057/laurent-rosenfeld/perl/ch-1.pl b/challenge-057/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..54b2d37bb4
--- /dev/null
+++ b/challenge-057/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,41 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+use feature qw/say/;
+use Data::Dumper;
+
+sub children { my $i = shift; 2*$i+1, 2*$i+2 }
+sub parent { my $i = shift; ($i-1)/2; }  # not needed here
+
+sub display {
+    my $bft_tree = bft(shift);
+    my $start = scalar @{$bft_tree->[-1]};
+    my $sep_val = (2 * $start) - 1;
+    for my $line (@$bft_tree) {
+        my $sep = " " x $sep_val;
+        say " " x $start, join $sep, @$line;
+        $start /= 2;
+        $sep_val = ($sep_val - 1) / 2;
+    }
+}
+sub bft {               # Breadth First Traversal
+    my $tree = shift;
+    my ($index, $level) = (0, 0);
+    my @bft_tree;
+    while ($index < scalar @$tree) {
+        my $new_index = $index + 2 ** $level - 1;
+        push @{$bft_tree[$level++]}, @{$tree}[$index .. $new_index];
+        $index = $new_index + 1;
+    }
+    return \@bft_tree;
+}
+sub invert {
+    return [ map { reverse @$_ } @{bft(shift)} ];
+}
+
+my $tree = [ 1..9, 'a'..'v' ];
+say "\nTree before inversion";
+display $tree;
+my $inverted_tree = invert($tree);
+say "\nInverted tree";
+display $inverted_tree;
diff --git a/challenge-057/laurent-rosenfeld/perl/ch-2.pl b/challenge-057/laurent-rosenfeld/perl/ch-2.pl
new file mode 100644
index 0000000000..48354e7251
--- /dev/null
+++ b/challenge-057/laurent-rosenfeld/perl/ch-2.pl
@@ -0,0 +1,30 @@
+#!/usr/bin/perl
+use strict;
+use warnings;
+use feature qw/say/;
+use Data::Dumper;
+
+my @words = qw /alphabet book carpet cadmium cadeau alpine/;
+my @prefixes;
+my %letters;
+for my $word (@words) {
+    push @{$letters{ substr $word, 0, 1 }}, $word;
+}
+for my $letter (sort keys %letters) {
+    push @prefixes, $letter and next if @{$letters{$letter}} == 1;
+    my $candidate;
+    for my $word1 ( @{$letters{$letter}} ) {
+        my $prefix_length = 1;
+        for my $word2 (@{$letters{$letter}} ) {
+            next if $word1 eq $word2;
+            my $i = 1;
+            $i++ while substr($word1, $i, 1) eq substr($word2, $i, 1);
+            if ($i > $prefix_length) {
+                $candidate = substr($word1, 0, $i + 1);
+                $prefix_length = $i
+            }
+        }
+    push @prefixes, $candidate;
+    }
+}
+say "@prefixes";
diff --git a/challenge-057/laurent-rosenfeld/raku/ch-1.p6 b/challenge-057/laurent-rosenfeld/raku/ch-1.p6
new file mode 100644
index 0000000000..b4c1a8a104
--- /dev/null
+++ b/challenge-057/laurent-rosenfeld/raku/ch-1.p6
@@ -0,0 +1,38 @@
+use v6;
+
+sub children (Int $i) { 2*$i+1, 2*$i+2 }
+sub parent (Int $i) { ($i-1)/2; }  # not needed here
+
+sub display ($tree) {
+    my @bft_tree = bft($tree);
+    my $start = (@bft_tree[*-1]).elems;
+    my $sep_val = (2 * $start) - 1;
+    for @bft_tree -> @line {
+        my $sep = " " x $sep_val;
+        say " " x $start, join $sep, @line;
+        $start /= 2;
+        $sep_val = ($sep_val - 1) / 2;
+    }
+}
+sub bft ($tree) {               # Breadth First Traversal
+    my ($index, $level) = (0, 0);
+    my @bft_tree;
+    while ($index <= $tree.end) {
+        my $new_index = $index + 2 ** $level - 1;
+        (@bft_tree[$level++]).append($tree[$index .. $new_index]);
+        $index = $new_index + 1;
+    }
+    return @bft_tree;
+}
+sub invert ($tree) {
+    return [ map { | reverse @$_ }, bft($tree) ];
+}
+
+my $tree = (1..9, 'a'..'v').flat;
+say $tree;
+say "\nTree before inversion";
+display $tree;
+my $inverted_tree = invert($tree);
+say "\nInverted tree";
+say "$inverted_tree\n";
+display $inverted_tree;
diff --git a/challenge-057/laurent-rosenfeld/raku/ch-2.p6 b/challenge-057/laurent-rosenfeld/raku/ch-2.p6
new file mode 100644
index 0000000000..246a9ed245
--- /dev/null
+++ b/challenge-057/laurent-rosenfeld/raku/ch-2.p6
@@ -0,0 +1,18 @@
+use v6;
+
+my @words = <alphabet foo book carpet cadmium cadeau alpine foxtrot>;
+my @prefixes;
+my %letters;
+%letters.push(substr($_, 0, 1) =>  $_) for @words;
+for %letters.keys.sort -> $let {
+    push @prefixes, $let and next if %letters{$let}.elems == 1;
+    my $candidate;
+    for %letters{$let}.flat -> $word {
+        for 2..$word.chars -> $i {
+            my $cand = substr $word, 0, $i;
+            my $count = %letters{$let}.grep({$cand eq substr($_, 0, $i)}).elems;
+            push @prefixes, $cand and last if $count == 1;
+        }
+    }
+}
+say @prefixes;
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 44c03c1ce2..dbf8355843 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,179 +1,54 @@
 {
-   "title" : {
-      "text" : "Perl Weekly Challenge - 057"
-   },
-   "tooltip" : {
-      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
-      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
-      "followPointer" : 1
-   },
-   "chart" : {
-      "type" : "column"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "legend" : {
       "enabled" : 0
    },
+   "subtitle" : {
+      "text" : "[Champions: 23] Last updated at 2020-04-26 18:42:58 GMT"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 057"
+   },
    "xAxis" : {
       "type" : "category"
    },
-   "series" : [
-      {
-         "name" : "Perl Weekly Challenge - 057",
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "drilldown" : "Alicia Bielsa",
-               "y" : 1,
-               "name" : "Alicia Bielsa"
-            },
-            {
-               "drilldown" : "Andrezgz",
-               "y" : 2,
-               "name" : "Andrezgz"
-            },
-            {
-               "drilldown" : "Arne Sommer",
-               "name" : "Arne Sommer",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Athanasius",
-               "y" : 1,
-               "name" : "Athanasius"
-            },
-            {
-               "drilldown" : "Cheok-Yin Fung",
-               "name" : "Cheok-Yin Fung",
-               "y" : 3
-            },
-            {
-               "y" : 3,
-               "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby"
-            },
-            {
-               "y" : 3,
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba"
-            },
-            {
-               "name" : "Jared Martin",
-               "y" : 3,
-               "drilldown" : "Jared Martin"
-            },
-            {
-               "drilldown" : "Javier Luque",
-               "name" : "Javier Luque",
-               "y" : 5
-            },
-            {
-               "name" : "Leo Manfredi",
-               "y" : 2,
-               "drilldown" : "Leo Manfredi"
-            },
-            {
-               "drilldown" : "Luca Ferrari",
-               "name" : "Luca Ferrari",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson",
-               "y" : 2
-            },
-            {
-               "name" : "Markus Holzer",
-               "y" : 1,
-               "drilldown" : "Markus Holzer"
-            },
-            {
-               "name" : "Matthew Somerville",
-               "y" : 2,
-               "drilldown" : "Matthew Somerville"
-            },
-            {
-               "name" : "Mohammad S Anwar",
-               "y" : 5,
-               "drilldown" : "Mohammad S Anwar"
-            },
-            {
-               "y" : 1,
-               "name" : "Pete Houston",
-               "drilldown" : "Pete Houston"
-            },
-            {
-               "drilldown" : "Roger Bell West",
-               "name" : "Roger Bell West",
-               "y" : 2
-            },
-            {
-               "name" : "Shahed Nooshmand",
-               "y" : 3,
-               "drilldown" : "Shahed Nooshmand"
-            },
-            {
-               "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Ulrich Rieke",
-               "y" : 2,
-               "name" : "Ulrich Rieke"
-            },
-            {
-               "drilldown" : "Wanderdoc",
-               "y" : 2,
-               "name" : "Wanderdoc"
-            },
-            {
-               "drilldown" : "Yet Ebreo",
-               "y" : 2,
-               "name" : "Yet Ebreo"
-            }
-         ]
-      }
-   ],
    "plotOptions" : {
       "series" : {
          "borderWidth" : 0,
          "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
+            "enabled" : 1,
+            "format" : "{point.y}"
          }
       }
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "subtitle" : {
-      "text" : "[Champions: 22] Last updated at 2020-04-26 16:51:55 GMT"
-   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Alicia Bielsa",
             "id" : "Alicia Bielsa",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "name" : "Alicia Bielsa"
          },
          {
-            "id" : "Andrezgz",
-            "name" : "Andrezgz",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Andrezgz",
+            "id" : "Andrezgz"
          },
          {
+            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -184,20 +59,20 @@
                   1
                ]
             ],
-            "name" : "Arne Sommer",
-            "id" : "Arne Sommer"
+            "name" : "Arne Sommer"
          },
          {
+            "name" : "Athanasius",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "name" : "Athanasius",
             "id" : "Athanasius"
          },
          {
+            "id" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
@@ -208,10 +83,11 @@
                   1
                ]
             ],
-            "id" : "Cheok-Yin Fung",
             "name" : "Cheok-Yin Fung"
          },
          {
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -221,13 +97,11 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
+            ]
          },
          {
-            "name" : "E. Choroba",
             "id" : "E. Choroba",
+            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -241,7 +115,6 @@
          },
          {
             "name" : "Jared Martin",
-            "id" : "Jared Martin",
             "data" : [
                [
                   "Perl",
@@ -251,11 +124,28 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Jared Martin"
          },
          {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ],
+               [
+                  "Raku",
+                  2
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
             "name" : "Javier Luque",
-            "id" : "Javier Luque",
+            "id" : "Javier Luque"
+         },
+         {
             "data" : [
                [
                   "Perl",
@@ -269,17 +159,19 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Laurent Rosenfeld",
+            "id" : "Laurent Rosenfeld"
          },
          {
             "id" : "Leo Manfredi",
-            "name" : "Leo Manfredi",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Leo Manfredi"
          },
          {
             "data" : [
@@ -296,37 +188,36 @@
             "id" : "Luca Ferrari"
          },
          {
-            "id" : "Mark Anderson",
-            "name" : "Mark Anderson",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Mark Anderson",
+            "id" : "Mark Anderson"
          },
          {
+            "name" : "Markus Holzer",
             "data" : [
                [
                   "Raku",
                   1
                ]
             ],
-            "name" : "Markus Holzer",
             "id" : "Markus Holzer"
          },
          {
+            "name" : "Matthew Somerville",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Matthew Somerville",
             "id" : "Matthew Somerville"
          },
          {
-            "name" : "Mohammad S Anwar",
             "id" : "Mohammad S Anwar",
             "data" : [
                [
@@ -341,17 +232,18 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Mohammad S Anwar"
          },
          {
             "name" : "Pete Houston",
-            "id" : "Pete Houston",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ]
+            ],
+            "id" : "Pete Houston"
          },
          {
             "data" : [
@@ -364,6 +256,7 @@
             "id" : "Roger Bell West"
          },
          {
+            "id" : "Shahed Nooshmand",
             "data" : [
                [
                   "Raku",
@@ -374,18 +267,17 @@
                   1
                ]
             ],
-            "name" : "Shahed Nooshmand",
-            "id" : "Shahed Nooshmand"
+            "name" : "Shahed Nooshmand"
          },
          {
+            "id" : "Simon Proctor",
+            "name" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Simon Proctor",
-            "name" : "Simon Proctor"
+            ]
          },
          {
             "id" : "Ulrich Rieke",
@@ -408,8 +300,8 @@
                   2
                ]
             ],
-            "id" : "Wanderdoc",
-            "name" : "Wanderdoc"
+            "name" : "Wanderdoc",
+            "id" : "Wanderdoc"
          },
          {
             "data" : [
@@ -422,5 +314,136 @@
             "id" : "Yet Ebreo"
          }
       ]
-   }
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "tooltip" : {
+      "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>",
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "followPointer" : 1
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 057",
+         "data" : [
+            {
+               "y" : 1,
+               "name" : "Alicia Bielsa",
+               "drilldown" : "Alicia Bielsa"
+            },
+            {
+               "drilldown" : "Andrezgz",
+               "name" : "Andrezgz",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Athanasius",
+               "y" : 1,
+               "name" : "Athanasius"
+            },
+            {
+               "y" : 3,
+               "name" : "Cheok-Yin Fung",
+               "drilldown" : "Cheok-Yin Fung"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "y" : 3,
+               "name" : "Dave Jacoby"
+            },
+            {
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Jared Martin",
+               "name" : "Jared Martin",
+               "y" : 3
+            },
+            {
+               "drilldown" : "Javier Luque",
+               "y" : 5,
+               "name" : "Javier Luque"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 5,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 2,
+               "name" : "Leo Manfredi",
+               "drilldown" : "Leo Manfredi"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 4,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "name" : "Mark Anderson",
+               "y" : 2
+            },
+            {
+               "name" : "Markus Holzer",
+               "y" : 1,
+               "drilldown" : "Markus Holzer"
+            },
+            {
+               "name" : "Matthew Somerville",
+               "y" : 2,
+               "drilldown" : "Matthew Somerville"
+            },
+            {
+               "drilldown" : "Mohammad S Anwar",
+               "y" : 5,
+               "name" : "Mohammad S Anwar"
+            },
+            {
+               "name" : "Pete Houston",
+               "y" : 1,
+               "drilldown" : "Pete Houston"
+            },
+            {
+               "drilldown" : "Roger Bell West",
+               "name" : "Roger Bell West",
+               "y" : 2
+            },
+            {
+               "name" : "Shahed Nooshmand",
+               "y" : 3,
+               "drilldown" : "Shahed Nooshmand"
+            },
+            {
+               "y" : 2,
+               "name" : "Simon Proctor",
+               "drilldown" : "Simon Proctor"
+            },
+            {
+               "name" : "Ulrich Rieke",
+               "y" : 2,
+               "drilldown" : "Ulrich Rieke"
+            },
+            {
+               "drilldown" : "Wanderdoc",
+               "y" : 2,
+               "name" : "Wanderdoc"
+            },
+            {
+               "name" : "Yet Ebreo",
+               "y" : 2,
+               "drilldown" : "Yet Ebreo"
+            }
+         ]
+      }
+   ]
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index 5267351126..1e135eafc7 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,63 +1,63 @@
 {
-   "subtitle" : {
-      "text" : "Last updated at 2020-04-26 16:51:55 GMT"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : null
-      },
-      "min" : 0
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
-         "name" : "Contributions",
-         "dataLabels" : {
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "align" : "right",
-            "color" : "#FFFFFF",
-            "y" : 10,
-            "rotation" : -90,
-            "enabled" : "true",
-            "format" : "{point.y:.0f}"
-         },
          "data" : [
             [
                "Blog",
-               640
+               641
             ],
             [
                "Perl",
-               2414
+               2416
             ],
             [
                "Raku",
-               1508
+               1510
             ]
-         ]
+         ],
+         "dataLabels" : {
+            "rotation" : -90,
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "format" : "{point.y:.0f}",
+            "color" : "#FFFFFF",
+            "enabled" : "true",
+            "y" : 10,
+            "align" : "right"
+         },
+         "name" : "Contributions"
       }
    ],
-   "xAxis" : {
-      "type" : "category",
-      "labels" : {
-         "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
-         }
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
+   },
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
       }
    },
    "legend" : {
       "enabled" : "false"
    },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "title" : {
       "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2020-04-26 18:42:58 GMT"
+   },
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 31ba32e665..f16bcb9c22 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,23 +1,7 @@
 {
-   "tooltip" : {
-      "followPointer" : "true",
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style=\"font-size:11px\"></span>"
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
-   },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-04-26 16:51:55 GMT"
-   },
    "drilldown" : {
       "series" : [
          {
-            "id" : "001",
-            "name" : "001",
             "data" : [
                [
                   "Perl",
@@ -31,10 +15,11 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "001",
+            "id" : "001"
          },
          {
-            "name" : "002",
             "id" : "002",
             "data" : [
                [
@@ -49,7 +34,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "002"
          },
          {
             "data" : [
@@ -70,6 +56,8 @@
             "id" : "003"
          },
          {
+            "id" : "004",
+            "name" : "004",
             "data" : [
                [
                   "Perl",
@@ -83,12 +71,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "004",
-            "name" : "004"
+            ]
          },
          {
-            "name" : "005",
             "id" : "005",
             "data" : [
                [
@@ -103,9 +88,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "005"
          },
          {
+            "name" : "006",
             "data" : [
                [
                   "Perl",
@@ -120,10 +107,11 @@
                   7
                ]
             ],
-            "name" : "006",
             "id" : "006"
          },
          {
+            "id" : "007",
+            "name" : "007",
             "data" : [
                [
                   "Perl",
@@ -137,11 +125,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "007",
-            "id" : "007"
+            ]
          },
          {
+            "id" : "008",
             "data" : [
                [
                   "Perl",
@@ -156,10 +143,10 @@
                   12
                ]
             ],
-            "id" : "008",
             "name" : "008"
          },
          {
+            "name" : "009",
             "data" : [
                [
                   "Perl",
@@ -174,10 +161,10 @@
                   13
                ]
             ],
-            "name" : "009",
             "id" : "009"
          },
          {
+            "name" : "010",
             "data" : [
                [
                   "Perl",
@@ -192,10 +179,11 @@
                   11
                ]
             ],
-            "id" : "010",
-            "name" : "010"
+            "id" : "010"
          },
          {
+            "id" : "011",
+            "name" : "011",
             "data" : [
                [
                   "Perl",
@@ -209,13 +197,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "011",
-            "name" : "011"
+            ]
          },
          {
-            "id" : "012",
-            "name" : "012",
             "data" : [
                [
                   "Perl",
@@ -229,9 +213,12 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "name" : "012",
+            "id" : "012"
          },
          {
+            "name" : "013",
             "data" : [
                [
                   "Perl",
@@ -246,10 +233,11 @@
                   13
                ]
             ],
-            "id" : "013",
-            "name" : "013"
+            "id" : "013"
          },
          {
+            "id" : "014",
+            "name" : "014",
             "data" : [
                [
                   "Perl",
@@ -263,12 +251,9 @@
                   "Blog",
                   15
                ]
-            ],
-            "name" : "014",
-            "id" : "014"
+            ]
          },
          {
-            "id" : "015",
             "name" : "015",
             "data" : [
                [
@@ -283,11 +268,10 @@
                   "Blog",
                   15
                ]
-            ]
+            ],
+            "id" : "015"
          },
          {
-            "id" : "016",
-            "name" : "016",
             "data" : [
                [
                   "Perl",
@@ -301,10 +285,11 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "016",
+            "id" : "016"
          },
          {
-            "id" : "017",
             "name" : "017",
             "data" : [
                [
@@ -319,9 +304,11 @@
                   "Blog",