- Added solutions by Ulrich Rieke.

16 files changed, 884 insertions, 735 deletions

diff --git a/challenge-040/ulrich-rieke/cpp/ch-1.cpp b/challenge-040/ulrich-rieke/cpp/ch-1.cpp
new file mode 100644
index 0000000000..80bc93f39e
--- /dev/null
+++ b/challenge-040/ulrich-rieke/cpp/ch-1.cpp
@@ -0,0 +1,38 @@
+#include <vector>
+#include <iostream>
+#include <algorithm>
+
+std::vector<std::vector<char>> createNewList(
+      std::vector<std::vector<char>> & list ) {
+  int minlength = std::min_element( list.begin( ) , list.end( ) ,
+    []( auto & listA , auto & listB ) { return listA.size( ) <
+    listB.size( ) ; } )->size( ) ;
+  std::vector<std::vector<char>> result ;
+  std::vector<char> partialResult ;
+  for ( int i = 0 ; i < minlength ; i++ ) {
+      for ( auto  it = list.begin( ) ; it != list.end( ) ; it++ ) {
+    partialResult.push_back( *(it->begin() + i) ) ;
+      }
+      result.push_back( partialResult ) ;
+      partialResult.clear( ) ;
+  }
+  return result ;
+}
+
+int main( ) {
+  std::vector<char> array1 {'I', 'L' , 'O',  'V' , 'E' , 'Y' , 'O', 'U' } ;
+  std::vector<char> array2 {'2', '4' , '0', '3', '2' , '0' , '1' , '9' } ;
+  std::vector<char> array3 {'!' , '?' , 'F', '$' , '%' , '^' , '&' , '*' } ;
+  std::vector<std::vector<char>> list ;
+  list.push_back( array1 ) ;
+  list.push_back( array2 ) ;
+  list.push_back( array3 ) ;
+  std::vector<std::vector<char>> result = createNewList( list ) ;
+  for ( auto & li : result ) {
+      for ( auto  it = li.begin( ) ; it != li.end( ) ; it++ ) {
+    std::cout << *it << ' ' ;
+      }
+      std::cout << std::endl ;
+  }
+  return 0 ;
+}
diff --git a/challenge-040/ulrich-rieke/cpp/ch-2.cpp b/challenge-040/ulrich-rieke/cpp/ch-2.cpp
new file mode 100644
index 0000000000..9e8cf8c589
--- /dev/null
+++ b/challenge-040/ulrich-rieke/cpp/ch-2.cpp
@@ -0,0 +1,26 @@
+#include <vector>
+#include <iostream>
+#include <algorithm>
+
+void  reorderList( std::vector<int> & numbers ,
+      std::vector<int> & indices ) {
+  std::vector<int> sublist ;
+  for ( int i : indices ) {
+      sublist.push_back( numbers[ i ] ) ;
+  }
+  std::sort( indices.begin( ) , indices.end( ) ) ;
+  std::sort( sublist.begin( ) , sublist.end( ) ) ;
+  for ( int i = 0 ; i < indices.size( ) ; i++ ) {
+      numbers[ indices[ i ]] = sublist[ i ] ;
+  }
+}
+
+int main( ) {
+  std::vector<int> numbers { 10 , 4 , 1 , 8 , 12 , 3 } ;
+  std::vector<int> indices { 0 , 2 , 5 } ;
+  reorderList( numbers , indices ) ;
+  for ( int i : numbers )
+      std::cout << i << ' ' ;
+  std::cout << std::endl ;
+  return 0 ;
+}
diff --git a/challenge-040/ulrich-rieke/haskell/ch-1.hs b/challenge-040/ulrich-rieke/haskell/ch-1.hs
new file mode 100644
index 0000000000..f477d9b48e
--- /dev/null
+++ b/challenge-040/ulrich-rieke/haskell/ch-1.hs
@@ -0,0 +1,9 @@
+module Challenge040
+  where
+import Data.List( (!!) , zip3 )
+
+convertLists :: [String] -> [String]
+convertLists list = map glue $ zip3 ( list !! 0 ) ( list !! 1 ) ( list !! 2 )
+  where
+      glue ::(Char, Char , Char) -> String
+      glue ( a , b , c ) = [a] ++ [b] ++ [c]
diff --git a/challenge-040/ulrich-rieke/haskell/ch-2.hs b/challenge-040/ulrich-rieke/haskell/ch-2.hs
new file mode 100644
index 0000000000..afc5a3b59d
--- /dev/null
+++ b/challenge-040/ulrich-rieke/haskell/ch-2.hs
@@ -0,0 +1,17 @@
+module Challenge040_2
+  where
+import qualified Data.Set as S
+import Data.Function ( on )
+import Data.List( (!! ), sort , sortBy )
+
+convert :: [Int] -> [Int] -> [Int]
+convert list indices =
+  let orderedIndices = sort indices
+      sublist = map (\i -> list !! i ) orderedIndices
+      sortedSublist = sort sublist
+      stableIndices = (S.fromList [0..length list - 1]) S.\\ (S.fromList
+        orderedIndices )
+      stableElements = map (\i -> list !! i) $ S.toList stableIndices
+      stablePairs = zip (S.toList stableIndices) stableElements
+      reorderedPairs = zip orderedIndices sortedSublist
+  in map snd $ sortBy ( compare `on` fst ) ( stablePairs ++ reorderedPairs )
diff --git a/challenge-040/ulrich-rieke/perl5/ch-1.pl b/challenge-040/ulrich-rieke/perl5/ch-1.pl
new file mode 100644
index 0000000000..8910e7e40b
--- /dev/null
+++ b/challenge-040/ulrich-rieke/perl5/ch-1.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/perl ;
+use strict ;
+use warnings ;
+
+sub printListItems {
+  my $minlength = @{$_[0]} + 0 ;
+  foreach my $list ( @_ ) {
+      my $len = @{$list} + 0 ;
+      if ( $len < $minlength ) {
+    $minlength = $len ;
+      }
+  }
+  print "$minlength \n" ;
+  my $i = 0 ;
+  while ( $i < $minlength ) {
+      foreach my $list ( @_ ) {
+    print "${$list}[$i] " ;
+      }
+      print "\n" ;
+      $i++ ;
+  }
+}
+
+my @array1 = ( 'I', 'L' , 'O' , 'V', 'E' , 'Y', 'O' , 'U' ) ;
+my @array2 = (2 , 4, 0, 3 , 2,  0 , 1, 9 ) ;
+my @array3 = ('!',  '?' ,  '£' , '$' , '%' , '^', '&' , '*' ) ;
+printListItems( \@array1 , \@array2 , \@array3 ) ;
diff --git a/challenge-040/ulrich-rieke/perl5/ch-2.pl b/challenge-040/ulrich-rieke/perl5/ch-2.pl
new file mode 100644
index 0000000000..ce13d04eb0
--- /dev/null
+++ b/challenge-040/ulrich-rieke/perl5/ch-2.pl
@@ -0,0 +1,17 @@
+#!/usr/bin/perl
+use strict ;
+use warnings ;
+
+my @list = ( 10, 4, 1, 8, 12, 3 ) ;
+my @indices = ( 0, 2, 5 ) ;
+#a numerical comparison is to be enforced in the next 2 lines
+my @sortedSlice = sort { $a <=> $b } @list[@indices] ;
+my @sortedIndices = sort { $a <=> $b } @indices ;
+my $arraylen = @sortedIndices + 0 ;
+for ( my $i = 0 ; $i < $arraylen ; $i++ ) {
+  $list[ $sortedIndices[ $i ]] = $sortedSlice[ $i ] ;
+}
+for my $item ( @list ) {
+  print "$item " ;
+}
+print "\n" ;
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 0c62d9d87c..7c58b74a0a 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,59 +1,7 @@
 {
-   "legend" : {
-      "enabled" : 0
-   },
-   "series" : [
-      {
-         "name" : "Perl Weekly Challenge - 040",
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "y" : 5,
-               "name" : "Javier Luque",
-               "drilldown" : "Javier Luque"
-            },
-            {
-               "name" : "Lubos Kolouch",
-               "drilldown" : "Lubos Kolouch",
-               "y" : 2
-            },
-            {
-               "y" : 4,
-               "name" : "Roger Bell West",
-               "drilldown" : "Roger Bell West"
-            },
-            {
-               "y" : 5,
-               "drilldown" : "Ryan Thompson",
-               "name" : "Ryan Thompson"
-            },
-            {
-               "drilldown" : "Simon Proctor",
-               "name" : "Simon Proctor",
-               "y" : 2
-            }
-         ]
-      }
-   ],
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         },
-         "borderWidth" : 0
-      }
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Javier Luque",
-            "id" : "Javier Luque",
             "data" : [
                [
                   "Perl 5",
@@ -67,21 +15,21 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Javier Luque",
+            "name" : "Javier Luque"
          },
          {
+            "name" : "Lubos Kolouch",
+            "id" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "id" : "Lubos Kolouch",
-            "name" : "Lubos Kolouch"
+            ]
          },
          {
-            "id" : "Roger Bell West",
-            "name" : "Roger Bell West",
             "data" : [
                [
                   "Perl 5",
@@ -91,7 +39,9 @@
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "id" : "Roger Bell West",
+            "name" : "Roger Bell West"
          },
          {
             "name" : "Ryan Thompson",
@@ -112,30 +62,95 @@
             ]
          },
          {
-            "name" : "Simon Proctor",
             "id" : "Simon Proctor",
+            "name" : "Simon Proctor",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
             ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl 5",
+                  2
+               ]
+            ],
+            "name" : "Ulrich Rieke",
+            "id" : "Ulrich Rieke"
          }
       ]
    },
+   "tooltip" : {
+      "followPointer" : 1,
+      "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/>"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "series" : [
+      {
+         "name" : "Perl Weekly Challenge - 040",
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "y" : 5,
+               "drilldown" : "Javier Luque",
+               "name" : "Javier Luque"
+            },
+            {
+               "name" : "Lubos Kolouch",
+               "y" : 2,
+               "drilldown" : "Lubos Kolouch"
+            },
+            {
+               "drilldown" : "Roger Bell West",
+               "y" : 4,
+               "name" : "Roger Bell West"
+            },
+            {
+               "drilldown" : "Ryan Thompson",
+               "y" : 5,
+               "name" : "Ryan Thompson"
+            },
+            {
+               "name" : "Simon Proctor",
+               "drilldown" : "Simon Proctor",
+               "y" : 2
+            },
+            {
+               "name" : "Ulrich Rieke",
+               "y" : 2,
+               "drilldown" : "Ulrich Rieke"
+            }
+         ]
+      }
+   ],
+   "title" : {
+      "text" : "Perl Weekly Challenge - 040"
+   },
    "subtitle" : {
-      "text" : "[Champions: 5] Last updated at 2019-12-23 19:05:54 GMT"
+      "text" : "[Champions: 6] Last updated at 2019-12-23 22:02:17 GMT"
    },
    "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
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
    },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 040"
+   "legend" : {
+      "enabled" : 0
    },
    "xAxis" : {
       "type" : "category"
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index b985e99cfe..1cb748e52c 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,24 +1,34 @@
 {
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions - 2019"
+   "chart" : {
+      "type" : "column"
    },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
+   "legend" : {
+      "enabled" : "false"
+   },
+   "xAxis" : {
+      "labels" : {
+         "style" : {
+            "fontFamily" : "Verdana, sans-serif",
+            "fontSize" : "13px"
+         }
+      },
+      "type" : "category"
    },
    "series" : [
       {
          "dataLabels" : {
-            "enabled" : "true",
+            "align" : "right",
+            "rotation" : -90,
+            "y" : 10,
             "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
             },
-            "y" : 10,
-            "rotation" : -90,
-            "color" : "#FFFFFF",
-            "align" : "right",
-            "format" : "{point.y:.0f}"
+            "enabled" : "true",
+            "format" : "{point.y:.0f}",
+            "color" : "#FFFFFF"
          },
+         "name" : "Contributions",
          "data" : [
             [
                "Blog",
@@ -26,30 +36,17 @@
             ],
             [
                "Perl 5",
-               1623
+               1625
             ],
             [
                "Perl 6",
                980
             ]
-         ],
-         "name" : "Contributions"
+         ]
       }
    ],
-   "chart" : {
-      "type" : "column"
-   },
-   "xAxis" : {
-      "labels" : {
-         "style" : {
-            "fontSize" : "13px",
-            "fontFamily" : "Verdana, sans-serif"
-         }
-      },
-      "type" : "category"
-   },
-   "legend" : {
-      "enabled" : "false"
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions - 2019"
    },
    "yAxis" : {
       "title" : {
@@ -58,6 +55,9 @@
       "min" : 0
    },
    "subtitle" : {
-      "text" : "Last updated at 2019-12-23 19:06:09 GMT"
+      "text" : "Last updated at 2019-12-23 22:02:30 GMT"
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index 1a09056b85..4ccb35b009 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,16 +1,7 @@
 {
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
-   },
-   "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"
-   },
    "drilldown" : {
       "series" : [
          {
-            "name" : "001",
             "data" : [
                [
                   "Perl 5",
@@ -25,6 +16,7 @@
                   11
                ]
             ],
+            "name" : "001",
             "id" : "001"
          },
          {
@@ -46,7 +38,6 @@
             ]
          },
          {
-            "name" : "003",
             "data" : [
                [
                   "Perl 5",
@@ -61,9 +52,11 @@
                   9
                ]
             ],
-            "id" : "003"
+            "id" : "003",
+            "name" : "003"
          },
          {
+            "id" : "004",
             "name" : "004",
             "data" : [
                [
@@ -78,10 +71,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "004"
+            ]
          },
          {
+            "id" : "005",
+            "name" : "005",
             "data" : [
                [
                   "Perl 5",
@@ -95,11 +89,11 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "005",
-            "id" : "005"
+            ]
          },
          {
+            "name" : "006",
+            "id" : "006",
             "data" : [
                [
                   "Perl 5",
@@ -113,9 +107,7 @@
                   "Blog",
                   7
                ]
-            ],
-            "name" : "006",
-            "id" : "006"
+            ]
          },
          {
             "data" : [
@@ -136,7 +128,6 @@
             "id" : "007"
          },
          {
-            "id" : "008",
             "data" : [
                [
                   "Perl 5",
@@ -151,9 +142,11 @@
                   12
                ]
             ],
+            "id" : "008",
             "name" : "008"
          },
          {
+            "id" : "009",
             "name" : "009",
             "data" : [
                [
@@ -168,10 +161,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "009"
+            ]
          },
          {
+            "name" : "010",
             "id" : "010",
             "data" : [
                [
@@ -186,10 +179,10 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "010"
+            ]
          },
          {
+            "id" : "011",
             "name" : "011",
             "data" : [
                [
@@ -204,11 +197,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "011"
+            ]
          },
          {
             "id" : "012",
+            "name" : "012",
             "data" : [
                [
                   "Perl 5",
@@ -222,12 +215,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "name" : "012"
+            ]
          },
          {
-            "id" : "013",
-            "name" : "013",
             "data" : [
                [
                   "Perl 5",
@@ -241,7 +231,9 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "id" : "013",
+            "name" : "013"
          },
          {
             "data" : [
@@ -276,11 +268,10 @@
                   15
                ]
             ],
-            "name" : "015",
-            "id" : "015"
+            "id" : "015",
+            "name" : "015"
          },
          {
-            "name" : "016",
             "data" : [
                [
                   "Perl 5",
@@ -295,10 +286,10 @@
                   12
                ]
             ],
-            "id" : "016"
+            "id" : "016",
+            "name" : "016"
          },
          {
-            "id" : "017",
             "data" : [
                [
                   "Perl 5",
@@ -313,10 +304,10 @@
                   12
                ]
             ],
+            "id" : "017",
             "name" : "017"
          },
          {
-            "id" : "018",
             "data" : [
                [
                   "Perl 5",
@@ -331,6 +322,7 @@
                   14
                ]
             ],
+            "id" : "018",
             "name" : "018"
          },
          {
@@ -352,6 +344,7 @@
             "id" : "019"
          },
          {
+            "name" : "020",
             "id" : "020",
             "data" : [
                [
@@ -366,10 +359,10 @@
                   "Blog",
                   13
                ]
-            ],
-            "name" : "020"
+            ]
          },
          {
+            "id" : "021",
             "name" : "021",
             "data" : [
                [
@@ -384,10 +377,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "021"
+            ]
          },
          {
+            "name" : "022",
+            "id" : "022",
             "data" : [
                [
                   "Perl 5",
@@ -401,13 +395,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "022",
-            "id" : "022"
+            ]
          },
          {
-            "id" : "023",
-            "name" : "023",
             "data" : [
                [
                   "Perl 5",
@@ -421,10 +411,13 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "023",
+            "name" : "023"
          },
          {
             "name" : "024",
+            "id" : "024",
             "data" : [
                [
                   "Perl 5",
@@ -438,11 +431,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "024"
+            ]
          },
          {
-            "id" : "025",
             "data" : [
                [
                   "Perl 5",
@@ -457,9 +448,11 @@
                   12
                ]
             ],
-            "name" : "025"
+            "name" : "025",
+            "id" : "025"
          },
          {
+            "id" : "026",
             "name" : "026",
             "data" : [
                [
@@ -474,8 +467,7 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "026"
+            ]
          },
          {
             "data" : [
@@ -492,10 +484,12 @@
                   9
                ]
             ],
-            "name" : "027",
-            "id" : "027"
+            "id" : "027",
+            "name" : "027"
          },
          {
+            "name" : "028",
+            "id" : "028",
             "data" : [
                [
                   "Perl 5",
@@ -509,13 +503,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "028",
-            "id" : "028"
+            ]
          },
          {
-            "id" : "029",
-            "name" : "029",
             "data" : [
                [
                   "Perl 5",
@@ -529,7 +519,9 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "029",
+            "id" : "029"
          },
          {
             "data" : [
@@ -546,10 +538,12 @@
                   10
                ]
             ],
-            "name" : "030",
-            "id" : "030"
+            "id" : "030",
+            "name" : "030"
          },
          {
+            "name" : "031",
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@@ -563,11 +557,11 @@
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@@ -581,12 +575,9 @@
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@@ -601,9 +592,11 @@
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@@ -618,8 +611,7 @@
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@@ -640,6 +632,8 @@
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@@ -653,11 +647,11 @@
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@@ -671,13 +665,11 @@
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+            "id" : "038",
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@@ -694,6 +686,8 @@
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@@ -707,15 +701,13 @@
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+                  10
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@@ -731,20 +723,42 @@
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+      "followPointer" : "true",
+      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>"
+   },
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2019-12-23 22:02:30 GMT"
+   },
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+      "series" : {
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+         "dataLabels" : {
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+   "yAxis" : {
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+         "text" : "Total Solutions"
+      }
+   },
    "series" : [
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          "name" : "Perl Weekly Challenge Languages",
          "colorByPoint" : "true",
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-               "name" : "#001",
-               "drilldown" : "001"
+               "name" : "#001"
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@@ -752,9 +766,9 @@
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@@ -768,17 +782,17 @@
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                "drilldown" : "007",
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@@ -787,14 +801,14 @@
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@@ -803,13 +817,13