- Added solutions by Laurent Rosenfeld.

- Added solutions by Kjetil Skotheim.
- Added solutions by W. Luis Mochan.

20 files changed, 2820 insertions, 2731 deletions

diff --git a/challenge-249/laurent-rosenfeld/blog.txt b/challenge-249/laurent-rosenfeld/blog.txt
new file mode 100644
index 0000000000..a49cdd6b3d
--- /dev/null
+++ b/challenge-249/laurent-rosenfeld/blog.txt
@@ -0,0 +1 @@
+https://blogs.perl.org/users/laurent_r/2023/12/perl-weekly-challenge-249-equal-pairs.html
diff --git a/challenge-249/laurent-rosenfeld/perl/ch-1.pl b/challenge-249/laurent-rosenfeld/perl/ch-1.pl
new file mode 100644
index 0000000000..6c308ba587
--- /dev/null
+++ b/challenge-249/laurent-rosenfeld/perl/ch-1.pl
@@ -0,0 +1,22 @@
+use strict;
+use warnings;
+use feature 'say';
+
+
+sub equal_pairs {
+    my %histo;
+    my $pairs;
+    $histo{$_}++ for @_;  # histogram to store frequencies
+    for my $key (keys %histo) {
+        return "()" if $histo{$key} % 2;
+        for (my $i = $histo{$key}; $i > 0; $i -= 2) {
+            $pairs .= "($key $key) ";
+        }
+    }
+    return $pairs;
+}
+
+for my $test ([3, 2, 3, 2, 2, 2], [1, 2, 3, 4]) {
+    printf "%-15s => ", "@$test";
+    say equal_pairs @$test;
+}
diff --git a/challenge-249/laurent-rosenfeld/raku/ch-1.raku b/challenge-249/laurent-rosenfeld/raku/ch-1.raku
new file mode 100644
index 0000000000..1aaeabce75
--- /dev/null
+++ b/challenge-249/laurent-rosenfeld/raku/ch-1.raku
@@ -0,0 +1,13 @@
+sub equal-pairs (@in) {
+    my @pairs;
+    for @in.sort -> $a, $b {
+        return "()" unless $a == $b;
+        push @pairs, ($a, $b);
+    }
+    return @pairs;
+}
+
+for (3, 2, 3, 2, 2, 2), (1, 2, 3, 4) -> @test {
+    printf "%-15s => ", "@test[]";
+    say equal-pairs @test;
+}
diff --git a/stats/pwc-challenge-248.json b/stats/pwc-challenge-248.json
index 3abdbb6dc4..a84c953f55 100644
--- a/stats/pwc-challenge-248.json
+++ b/stats/pwc-challenge-248.json
@@ -1,184 +1,26 @@
 {
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "chart" : {
+      "type" : "column"
    },
-   "xAxis" : {
-      "type" : "category"
+   "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/>"
+   },
+   "subtitle" : {
+      "text" : "[Champions: 31] Last updated at 2023-12-28 00:47:19 GMT"
    },
-   "series" : [
-      {
-         "name" : "The Weekly Challenge - 248",
-         "data" : [
-            {
-               "name" : "Ali Moradi",
-               "drilldown" : "Ali Moradi",
-               "y" : 5
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Arne Sommer",
-               "name" : "Arne Sommer"
-            },
-            {
-               "drilldown" : "Athanasius",
-               "name" : "Athanasius",
-               "y" : 4
-            },
-            {
-               "name" : "BarrOff",
-               "drilldown" : "BarrOff",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "name" : "Bob Lied",
-               "drilldown" : "Bob Lied"
-            },
-            {
-               "y" : 2,
-               "name" : "Bruce Gray",
-               "drilldown" : "Bruce Gray"
-            },
-            {
-               "name" : "Cheok-Yin Fung",
-               "drilldown" : "Cheok-Yin Fung",
-               "y" : 2
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Dave Jacoby",
-               "name" : "Dave Jacoby"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "David Ferrone",
-               "name" : "David Ferrone"
-            },
-            {
-               "y" : 2,
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba"
-            },
-            {
-               "name" : "Jan Krnavek",
-               "drilldown" : "Jan Krnavek",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Joelle Maslak",
-               "name" : "Joelle Maslak"
-            },
-            {
-               "y" : 3,
-               "name" : "Jorg Sommrey",
-               "drilldown" : "Jorg Sommrey"
-            },
-            {
-               "name" : "Laurent Rosenfeld",
-               "drilldown" : "Laurent Rosenfeld",
-               "y" : 6
-            },
-            {
-               "drilldown" : "Lubos Kolouch",
-               "name" : "Lubos Kolouch",
-               "y" : 5
-            },
-            {
-               "y" : 10,
-               "drilldown" : "Luca Ferrari",
-               "name" : "Luca Ferrari"
-            },
-            {
-               "y" : 2,
-               "name" : "Mark Anderson",
-               "drilldown" : "Mark Anderson"
-            },
-            {
-               "name" : "Matthew Neleigh",
-               "drilldown" : "Matthew Neleigh",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Nelo Tovar",
-               "name" : "Nelo Tovar"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Niels van Dijke",
-               "name" : "Niels van Dijke"
-            },
-            {
-               "drilldown" : "Packy Anderson",
-               "name" : "Packy Anderson",
-               "y" : 5
-            },
-            {
-               "y" : 3,
-               "drilldown" : "Peter Campbell Smith",
-               "name" : "Peter Campbell Smith"
-            },
-            {
-               "drilldown" : "Peter Meszaros",
-               "name" : "Peter Meszaros",
-               "y" : 2
-            },
-            {
-               "name" : "Robbie Hatley",
-               "drilldown" : "Robbie Hatley",
-               "y" : 3
-            },
-            {
-               "y" : 5,
-               "name" : "Roger Bell_West",
-               "drilldown" : "Roger Bell_West"
-            },
-            {
-               "drilldown" : "Simon Green",
-               "name" : "Simon Green",
-               "y" : 3
-            },
-            {
-               "drilldown" : "Stephen G. Lynn",
-               "name" : "Stephen G. Lynn",
-               "y" : 3
-            },
-            {
-               "y" : 4,
-               "name" : "Thomas Kohler",
-               "drilldown" : "Thomas Kohler"
-            },
-            {
-               "drilldown" : "Ulrich Rieke",
-               "name" : "Ulrich Rieke",
-               "y" : 4
-            },
-            {
-               "y" : 3,
-               "name" : "W. Luis Mochan",
-               "drilldown" : "W. Luis Mochan"
-            }
-         ],
-         "colorByPoint" : 1
-      }
-   ],
    "title" : {
       "text" : "The Weekly Challenge - 248"
    },
-   "chart" : {
-      "type" : "column"
-   },
-   "subtitle" : {
-      "text" : "[Champions: 30] Last updated at 2023-12-27 11:15:06 GMT"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
    },
    "drilldown" : {
       "series" : [
          {
-            "name" : "Ali Moradi",
-            "id" : "Ali Moradi",
             "data" : [
                [
                   "Perl",
@@ -192,11 +34,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Ali Moradi",
+            "id" : "Ali Moradi"
          },
          {
-            "name" : "Arne Sommer",
-            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -206,7 +48,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Arne Sommer",
+            "id" : "Arne Sommer"
          },
          {
             "id" : "Athanasius",
@@ -247,26 +91,28 @@
             ]
          },
          {
+            "id" : "Bruce Gray",
             "data" : [
                [
                   "Raku",
                   2
                ]
             ],
-            "id" : "Bruce Gray",
             "name" : "Bruce Gray"
          },
          {
             "id" : "Cheok-Yin Fung",
-            "name" : "Cheok-Yin Fung",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Cheok-Yin Fung"
          },
          {
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -276,9 +122,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
+            ]
          },
          {
             "data" : [
@@ -287,40 +131,41 @@
                   2
                ]
             ],
-            "id" : "David Ferrone",
-            "name" : "David Ferrone"
+            "name" : "David Ferrone",
+            "id" : "David Ferrone"
          },
          {
-            "name" : "E. Choroba",
             "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "E. Choroba"
          },
          {
+            "id" : "Jan Krnavek",
+            "name" : "Jan Krnavek",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Jan Krnavek",
-            "id" : "Jan Krnavek"
+            ]
          },
          {
-            "name" : "Joelle Maslak",
-            "id" : "Joelle Maslak",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Joelle Maslak",
+            "id" : "Joelle Maslak"
          },
          {
+            "name" : "Jorg Sommrey",
             "data" : [
                [
                   "Perl",
@@ -331,10 +176,20 @@
                   1
                ]
             ],
-            "id" : "Jorg Sommrey",
-            "name" : "Jorg Sommrey"
+            "id" : "Jorg Sommrey"
          },
          {
+            "id" : "Kjetil Skotheim",
+            "name" : "Kjetil Skotheim",
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
+            ]
+         },
+         {
+            "id" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -349,12 +204,11 @@
                   2
                ]
             ],
-            "id" : "Laurent Rosenfeld",
             "name" : "Laurent Rosenfeld"
          },
          {
-            "name" : "Lubos Kolouch",
             "id" : "Lubos Kolouch",
+            "name" : "Lubos Kolouch",
             "data" : [
                [
                   "Perl",
@@ -372,7 +226,6 @@
          },
          {
             "name" : "Luca Ferrari",
-            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -382,7 +235,8 @@
                   "Blog",
                   8
                ]
-            ]
+            ],
+            "id" : "Luca Ferrari"
          },
          {
             "id" : "Mark Anderson",
@@ -401,32 +255,30 @@
                   2
                ]
             ],
-            "id" : "Matthew Neleigh",
-            "name" : "Matthew Neleigh"
+            "name" : "Matthew Neleigh",
+            "id" : "Matthew Neleigh"
          },
          {
-            "id" : "Nelo Tovar",
             "name" : "Nelo Tovar",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "id" : "Nelo Tovar"
          },
          {
             "id" : "Niels van Dijke",
-            "name" : "Niels van Dijke",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Niels van Dijke"
          },
          {
-            "id" : "Packy Anderson",
-            "name" : "Packy Anderson",
             "data" : [
                [
                   "Perl",
@@ -440,11 +292,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Packy Anderson",
+            "id" : "Packy Anderson"
          },
          {
-            "id" : "Peter Campbell Smith",
-            "name" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -454,7 +306,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Peter Campbell Smith",
+            "id" : "Peter Campbell Smith"
          },
          {
             "data" : [
@@ -463,10 +317,11 @@
                   2
                ]
             ],
-            "id" : "Peter Meszaros",
-            "name" : "Peter Meszaros"
+            "name" : "Peter Meszaros",
+            "id" : "Peter Meszaros"
          },
          {
+            "id" : "Robbie Hatley",
             "data" : [
                [
                   "Perl",
@@ -477,10 +332,10 @@
                   1
                ]
             ],
-            "name" : "Robbie Hatley",
-            "id" : "Robbie Hatley"
+            "name" : "Robbie Hatley"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -495,10 +350,11 @@
                   1
                ]
             ],
-            "id" : "Roger Bell_West",
-            "name" : "Roger Bell_West"
+            "id" : "Roger Bell_West"
          },
          {
+            "id" : "Simon Green",
+            "name" : "Simon Green",
             "data" : [
                [
                   "Perl",
@@ -508,12 +364,9 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Simon Green",
-            "id" : "Simon Green"
+            ]
          },
          {
-            "name" : "Stephen G. Lynn",
             "id" : "Stephen G. Lynn",
             "data" : [
                [
@@ -524,11 +377,11 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Stephen G. Lynn"
          },
          {
             "name" : "Thomas Kohler",
-            "id" : "Thomas Kohler",
             "data" : [
                [
                   "Perl",
@@ -538,9 +391,12 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "id" : "Thomas Kohler"
          },
          {
+            "id" : "Ulrich Rieke",
+            "name" : "Ulrich Rieke",
             "data" : [
                [
                   "Perl",
@@ -550,11 +406,11 @@
                   "Raku",
                   2
                ]
-            ],
-            "name" : "Ulrich Rieke",
-            "id" : "Ulrich Rieke"
+            ]
          },
          {
+            "id" : "W. Luis Mochan",
+            "name" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -564,17 +420,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "W. Luis Mochan",
-            "id" : "W. Luis Mochan"
+            ]
          }
       ]
    },
-   "tooltip" : {
-      "followPointer" : 1,
-      "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/>"
-   },
    "plotOptions" : {
       "series" : {
          "dataLabels" : {
@@ -584,6 +433,172 @@
          "borderWidth" : 0
       }
    },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "series" : [
+      {
+         "name" : "The Weekly Challenge - 248",
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "name" : "Ali Moradi",
+               "drilldown" : "Ali Moradi",
+               "y" : 5
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "y" : 3,
+               "name" : "Arne Sommer"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "BarrOff",
+               "name" : "BarrOff"
+            },
+            {
+               "name" : "Bob Lied",
+               "drilldown" : "Bob Lied",
+               "y" : 2
+            },
+            {
+               "name" : "Bruce Gray",
+               "y" : 2,
+               "drilldown" : "Bruce Gray"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Cheok-Yin Fung",
+               "name" : "Cheok-Yin Fung"
+            },
+            {
+               "name" : "Dave Jacoby",
+               "y" : 3,
+               "drilldown" : "Dave Jacoby"
+            },
+            {
+               "name" : "David Ferrone",
+               "drilldown" : "David Ferrone",
+               "y" : 2
+            },
+            {
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
+               "y" : 2
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Jan Krnavek",
+               "name" : "Jan Krnavek"
+            },
+            {
+               "name" : "Joelle Maslak",
+               "y" : 2,
+               "drilldown" : "Joelle Maslak"
+            },
+            {
+               "drilldown" : "Jorg Sommrey",
+               "y" : 3,
+               "name" : "Jorg Sommrey"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Kjetil Skotheim",
+               "name" : "Kjetil Skotheim"
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "y" : 6,
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Lubos Kolouch",
+               "name" : "Lubos Kolouch"
+            },
+            {
+               "drilldown" : "Luca Ferrari",
+               "y" : 10,
+               "name" : "Luca Ferrari"
+            },
+            {
+               "drilldown" : "Mark Anderson",
+               "y" : 2,
+               "name" : "Mark Anderson"
+            },
+            {
+               "name" : "Matthew Neleigh",
+               "drilldown" : "Matthew Neleigh",
+               "y" : 2
+            },
+            {
+               "name" : "Nelo Tovar",
+               "y" : 2,
+               "drilldown" : "Nelo Tovar"
+            },
+            {
+               "name" : "Niels van Dijke",
+               "drilldown" : "Niels van Dijke",
+               "y" : 2
+            },
+            {
+               "name" : "Packy Anderson",
+               "y" : 5,
+               "drilldown" : "Packy Anderson"
+            },
+            {
+               "name" : "Peter Campbell Smith",
+               "y" : 3,
+               "drilldown" : "Peter Campbell Smith"
+            },
+            {
+               "name" : "Peter Meszaros",
+               "drilldown" : "Peter Meszaros",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Robbie Hatley",
+               "y" : 3,
+               "name" : "Robbie Hatley"
+            },
+            {
+               "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West",
+               "y" : 5
+            },
+            {
+               "name" : "Simon Green",
+               "drilldown" : "Simon Green",
+               "y" : 3
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Stephen G. Lynn",
+               "name" : "Stephen G. Lynn"
+            },
+            {
+               "drilldown" : "Thomas Kohler",
+               "y" : 4,
+               "name" : "Thomas Kohler"
+            },
+            {
+               "drilldown" : "Ulrich Rieke",
+               "y" : 4,
+               "name" : "Ulrich Rieke"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "W. Luis Mochan",
+               "name" : "W. Luis Mochan"
+            }
+         ]
+      }
+   ],
    "legend" : {
       "enabled" : 0
    }
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index 445f25ac7c..bd4c608bfe 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,9 +1,16 @@
 {
-   "title" : {
-      "text" : "The Weekly Challenge - 249"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
+         "colorByPoint" : 1,
+         "name" : "The Weekly Challenge - 249",
          "data" : [
             {
                "y" : 3,
@@ -11,44 +18,54 @@
                "name" : "Arne Sommer"
             },
             {
-               "name" : "Dave Jacoby",
                "y" : 3,
-               "drilldown" : "Dave Jacoby"
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby"
             },
             {
-               "name" : "David Ferrone",
                "y" : 2,
+               "name" : "David Ferrone",
                "drilldown" : "David Ferrone"
             },
             {
-               "name" : "E. Choroba",
                "y" : 2,
+               "name" : "E. Choroba",
                "drilldown" : "E. Choroba"
             },
             {
+               "name" : "Kjetil Skotheim",
+               "drilldown" : "Kjetil Skotheim",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld",
+               "y" : 3
+            },
+            {
                "name" : "Luca Ferrari",
-               "y" : 10,
-               "drilldown" : "Luca Ferrari"
+               "drilldown" : "Luca Ferrari",
+               "y" : 10
             },
             {
-               "y" : 2,
                "drilldown" : "Mark Anderson",
-               "name" : "Mark Anderson"
+               "name" : "Mark Anderson",
+               "y" : 2
             },
             {
-               "name" : "Packy Anderson",
                "y" : 5,
+               "name" : "Packy Anderson",
                "drilldown" : "Packy Anderson"
             },
             {
                "y" : 3,
-               "drilldown" : "Peter Campbell Smith",
-               "name" : "Peter Campbell Smith"
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith"
             },
             {
-               "y" : 2,
+               "name" : "Peter Meszaros",
                "drilldown" : "Peter Meszaros",
-               "name" : "Peter Meszaros"
+               "y" : 2
             },
             {
                "y" : 4,
@@ -56,35 +73,47 @@
                "name" : "Roger Bell_West"
             },
             {
-               "name" : "Stephen G. Lynn",
                "drilldown" : "Stephen G. Lynn",
+               "name" : "Stephen G. Lynn",
                "y" : 3
             },
             {
-               "drilldown" : "Thomas Kohler",
                "y" : 4,
+               "drilldown" : "Thomas Kohler",
                "name" : "Thomas Kohler"
             },
             {
-               "name" : "Ulrich Rieke",
+               "y" : 4,
                "drilldown" : "Ulrich Rieke",
-               "y" : 4
+               "name" : "Ulrich Rieke"
             },
             {
-               "name" : "W. Luis Mochan",
+               "y" : 3,
                "drilldown" : "W. Luis Mochan",
-               "y" : 3
+               "name" : "W. Luis Mochan"
             }
-         ],
-         "colorByPoint" : 1,
-         "name" : "The Weekly Challenge - 249"
+         ]
       }
    ],
+   "legend" : {
+      "enabled" : 0
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
+   "xAxis" : {
+      "type" : "category"
+   },
    "drilldown" : {
       "series" : [
          {
             "name" : "Arne Sommer",
-            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -94,9 +123,12 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "Arne Sommer"
          },
          {
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -106,31 +138,58 @@
                   "Blog",
                   1
                ]
+            ]
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  2
+               ]
             ],
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby"
+            "id" : "David Ferrone",
+            "name" : "David Ferrone"
          },
          {
-            "name" : "David Ferrone",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "David Ferrone"
+            "id" : "E. Choroba",
+            "name" : "E. Choroba"
          },
          {
-            "name" : "E. Choroba",
+            "id" : "Kjetil Skotheim",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "E. Choroba"
+            "name" : "Kjetil Skotheim"
          },
          {
+            "id" : "Laurent Rosenfeld",
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ],
+               [
+                  "Raku",
+                  1
+               ],
+               [
+                  "Blog",
+                  1
+               ]
+            ],
+            "name" : "Laurent Rosenfeld"
+         },
+         {
+            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -141,20 +200,20 @@
                   8
                ]
             ],
-            "id" : "Luca Ferrari",
-            "name" : "Luca Ferrari"
+            "id" : "Luca Ferrari"
          },
          {
+            "i