- Added solutions to week #009, #013, #064, #072, #074, #075 and #077 by Feng Chang.

26 files changed, 2722 insertions, 2624 deletions

diff --git a/challenge-009/feng-chang/perl5/ch-1.pl b/challenge-009/feng-chang/perl/ch-1.pl
index a883e28946..a883e28946 100755
--- a/challenge-009/feng-chang/perl5/ch-1.pl
+++ b/challenge-009/feng-chang/perl/ch-1.pl
diff --git a/challenge-009/feng-chang/perl6/ch-1-one-liner.p6 b/challenge-009/feng-chang/raku/ch-1-one-liner.p6
index 7699bd89c8..7699bd89c8 100755
--- a/challenge-009/feng-chang/perl6/ch-1-one-liner.p6
+++ b/challenge-009/feng-chang/raku/ch-1-one-liner.p6
diff --git a/challenge-009/feng-chang/perl6/ch-1.p6 b/challenge-009/feng-chang/raku/ch-1.p6
index 1039d77b3d..1039d77b3d 100755
--- a/challenge-009/feng-chang/perl6/ch-1.p6
+++ b/challenge-009/feng-chang/raku/ch-1.p6
diff --git a/challenge-013/feng-chang/perl5/ch-1.pl b/challenge-013/feng-chang/perl/ch-1.pl
index 1f2c604bc2..1f2c604bc2 100755
--- a/challenge-013/feng-chang/perl5/ch-1.pl
+++ b/challenge-013/feng-chang/perl/ch-1.pl
diff --git a/challenge-013/feng-chang/perl5/ch-2.pl b/challenge-013/feng-chang/perl/ch-2.pl
index 27b72c67ce..27b72c67ce 100755
--- a/challenge-013/feng-chang/perl5/ch-2.pl
+++ b/challenge-013/feng-chang/perl/ch-2.pl
diff --git a/challenge-013/feng-chang/perl6/ch-1.p6 b/challenge-013/feng-chang/raku/ch-1.p6
index 17436e10c7..17436e10c7 100755
--- a/challenge-013/feng-chang/perl6/ch-1.p6
+++ b/challenge-013/feng-chang/raku/ch-1.p6
diff --git a/challenge-013/feng-chang/perl6/ch-2.p6 b/challenge-013/feng-chang/raku/ch-2.p6
index 262dfce177..262dfce177 100755
--- a/challenge-013/feng-chang/perl6/ch-2.p6
+++ b/challenge-013/feng-chang/raku/ch-2.p6
diff --git a/challenge-072/feng-chang/raku/ch-1a.raku b/challenge-072/feng-chang/raku/ch-1.raku
index 5701a8172e..5701a8172e 100755
--- a/challenge-072/feng-chang/raku/ch-1a.raku
+++ b/challenge-072/feng-chang/raku/ch-1.raku
diff --git a/stats/pwc-challenge-009.json b/stats/pwc-challenge-009.json
index f1fc272bc1..236feaad15 100644
--- a/stats/pwc-challenge-009.json
+++ b/stats/pwc-challenge-009.json
@@ -1,4 +1,140 @@
 {
+   "series" : [
+      {
+         "name" : "Perl Weekly Challenge - 009",
+         "colorByPoint" : 1,
+         "data" : [
+            {
+               "y" : 3,
+               "drilldown" : "Adam Russell",
+               "name" : "Adam Russell"
+            },
+            {
+               "drilldown" : "Andrezgz",
+               "y" : 2,
+               "name" : "Andrezgz"
+            },
+            {
+               "drilldown" : "Arne Sommer",
+               "y" : 3,
+               "name" : "Arne Sommer"
+            },
+            {
+               "drilldown" : "Athanasius",
+               "y" : 2,
+               "name" : "Athanasius"
+            },
+            {
+               "name" : "Daniel Mantovani",
+               "drilldown" : "Daniel Mantovani",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Daniel Mita",
+               "y" : 2,
+               "name" : "Daniel Mita"
+            },
+            {
+               "drilldown" : "Dave Jacoby",
+               "y" : 4,
+               "name" : "Dave Jacoby"
+            },
+            {
+               "name" : "E. Choroba",
+               "drilldown" : "E. Choroba",
+               "y" : 3
+            },
+            {
+               "name" : "Feng Chang",
+               "drilldown" : "Feng Chang",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Francis Whittle",
+               "y" : 3,
+               "name" : "Francis Whittle"
+            },
+            {
+               "name" : "Guillermo Ramos",
+               "y" : 2,
+               "drilldown" : "Guillermo Ramos"
+            },
+            {
+               "name" : "Gustavo Chaves",
+               "drilldown" : "Gustavo Chaves",
+               "y" : 2
+            },
+            {
+               "name" : "Jaldhar H. Vyas",
+               "y" : 4,
+               "drilldown" : "Jaldhar H. Vyas"
+            },
+            {
+               "drilldown" : "Joelle Maslak",
+               "y" : 7,
+               "name" : "Joelle Maslak"
+            },
+            {
+               "name" : "Kevin Colyer",
+               "y" : 2,
+               "drilldown" : "Kevin Colyer"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Kian-Meng Ang",
+               "name" : "Kian-Meng Ang"
+            },
+            {
+               "y" : 7,
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "name" : "Maxim Nechaev",
+               "y" : 2,
+               "drilldown" : "Maxim Nechaev"
+            },
+            {
+               "name" : "Ruben Westerberg",
+               "y" : 4,
+               "drilldown" : "Ruben Westerberg"
+            },
+            {
+               "name" : "Simon Proctor",
+               "drilldown" : "Simon Proctor",
+               "y" : 1
+            },
+            {
+               "drilldown" : "Steven Wilson",
+               "y" : 2,
+               "name" : "Steven Wilson"
+            },
+            {
+               "name" : "Veesh Goldman",
+               "drilldown" : "Veesh Goldman",
+               "y" : 3
+            },
+            {
+               "name" : "Yet Ebreo",
+               "drilldown" : "Yet Ebreo",
+               "y" : 1
+            },
+            {
+               "name" : "Yozen Hernandez",
+               "drilldown" : "Yozen Hernandez",
+               "y" : 3
+            }
+         ]
+      }
+   ],
+   "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/>"
+   },
+   "legend" : {
+      "enabled" : 0
+   },
    "plotOptions" : {
       "series" : {
          "dataLabels" : {
@@ -8,31 +144,10 @@
          "borderWidth" : 0
       }
    },
-   "xAxis" : {
-      "type" : "category"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 009"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "subtitle" : {
-      "text" : "[Champions: 23] Last updated at 2020-01-05 01:37:34 GMT"
-   },
-   "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
-   },
-   "legend" : {
-      "enabled" : 0
-   },
    "drilldown" : {
       "series" : [
          {
+            "name" : "Adam Russell",
             "id" : "Adam Russell",
             "data" : [
                [
@@ -43,12 +158,11 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Adam Russell"
+            ]
          },
          {
-            "id" : "Andrezgz",
             "name" : "Andrezgz",
+            "id" : "Andrezgz",
             "data" : [
                [
                   "Perl",
@@ -57,7 +171,6 @@
             ]
          },
          {
-            "name" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -68,37 +181,38 @@
                   1
                ]
             ],
-            "id" : "Arne Sommer"
+            "id" : "Arne Sommer",
+            "name" : "Arne Sommer"
          },
          {
-            "name" : "Athanasius",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "name" : "Athanasius",
             "id" : "Athanasius"
          },
          {
+            "name" : "Daniel Mantovani",
             "id" : "Daniel Mantovani",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Daniel Mantovani"
+            ]
          },
          {
+            "id" : "Daniel Mita",
             "name" : "Daniel Mita",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Daniel Mita"
+            ]
          },
          {
             "data" : [
@@ -111,12 +225,10 @@
                   2
                ]
             ],
-            "name" : "Dave Jacoby",
-            "id" : "Dave Jacoby"
+            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby"
          },
          {
-            "id" : "E. Choroba",
-            "name" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -126,10 +238,25 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "id" : "E. Choroba",
+            "name" : "E. Choroba"
+         },
+         {
+            "data" : [
+               [
+                  "Perl",
+                  1
+               ],
+               [
+                  "Raku",
+                  1
+               ]
+            ],
+            "id" : "Feng Chang",
+            "name" : "Feng Chang"
          },
          {
-            "name" : "Francis Whittle",
             "data" : [
                [
                   "Raku",
@@ -140,17 +267,18 @@
                   1
                ]
             ],
-            "id" : "Francis Whittle"
+            "id" : "Francis Whittle",
+            "name" : "Francis Whittle"
          },
          {
-            "name" : "Guillermo Ramos",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "id" : "Guillermo Ramos"
+            "id" : "Guillermo Ramos",
+            "name" : "Guillermo Ramos"
          },
          {
             "id" : "Gustavo Chaves",
@@ -163,7 +291,6 @@
             ]
          },
          {
-            "id" : "Jaldhar H. Vyas",
             "data" : [
                [
                   "Perl",
@@ -174,11 +301,10 @@
                   2
                ]
             ],
+            "id" : "Jaldhar H. Vyas",
             "name" : "Jaldhar H. Vyas"
          },
          {
-            "id" : "Joelle Maslak",
-            "name" : "Joelle Maslak",
             "data" : [
                [
                   "Perl",
@@ -192,7 +318,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Joelle Maslak",
+            "id" : "Joelle Maslak"
          },
          {
             "data" : [
@@ -205,7 +333,6 @@
             "id" : "Kevin Colyer"
          },
          {
-            "id" : "Kian-Meng Ang",
             "data" : [
                [
                   "Perl",
@@ -216,10 +343,10 @@
                   2
                ]
             ],
-            "name" : "Kian-Meng Ang"
+            "name" : "Kian-Meng Ang",
+            "id" : "Kian-Meng Ang"
          },
          {
-            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -234,16 +361,17 @@
                   3
                ]
             ],
+            "name" : "Laurent Rosenfeld",
             "id" : "Laurent Rosenfeld"
          },
          {
-            "id" : "Maxim Nechaev",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
+            "id" : "Maxim Nechaev",
             "name" : "Maxim Nechaev"
          },
          {
@@ -257,28 +385,28 @@
                   2
                ]
             ],
-            "name" : "Ruben Westerberg",
-            "id" : "Ruben Westerberg"
+            "id" : "Ruben Westerberg",
+            "name" : "Ruben Westerberg"
          },
          {
-            "id" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   1
                ]
             ],
-            "name" : "Simon Proctor"
+            "name" : "Simon Proctor",
+            "id" : "Simon Proctor"
          },
          {
-            "id" : "Steven Wilson",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Steven Wilson"
+            "name" : "Steven Wilson",
+            "id" : "Steven Wilson"
          },
          {
             "id" : "Veesh Goldman",
@@ -292,16 +420,15 @@
          },
          {
             "name" : "Yet Ebreo",
+            "id" : "Yet Ebreo",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "id" : "Yet Ebreo"
+            ]
          },
          {
-            "name" : "Yozen Hernandez",
             "data" : [
                [
                   "Perl",
@@ -312,134 +439,26 @@
                   1
                ]
             ],
-            "id" : "Yozen Hernandez"
+            "id" : "Yozen Hernandez",
+            "name" : "Yozen Hernandez"
          }
       ]
    },
+   "xAxis" : {
+      "type" : "category"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge - 009"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
    "chart" : {
       "type" : "column"
    },
-   "series" : [
-      {
-         "colorByPoint" : 1,
-         "data" : [
-            {
-               "y" : 3,
-               "drilldown" : "Adam Russell",
-               "name" : "Adam Russell"
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Andrezgz",
-               "name" : "Andrezgz"
-            },
-            {
-               "name" : "Arne Sommer",
-               "drilldown" : "Arne Sommer",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Athanasius",
-               "name" : "Athanasius"
-            },
-            {
-               "drilldown" : "Daniel Mantovani",
-               "name" : "Daniel Mantovani",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Daniel Mita",
-               "name" : "Daniel Mita"
-            },
-            {
-               "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby",
-               "y" : 4
-            },
-            {
-               "name" : "E. Choroba",
-               "drilldown" : "E. Choroba",
-               "y" : 3
-            },
-            {
-               "name" : "Francis Whittle",
-               "drilldown" : "Francis Whittle",
-               "y" : 3
-            },
-            {
-               "y" : 2,
-               "name" : "Guillermo Ramos",
-               "drilldown" : "Guillermo Ramos"
-            },
-            {
-               "name" : "Gustavo Chaves",
-               "drilldown" : "Gustavo Chaves",
-               "y" : 2
-            },
-            {
-               "y" : 4,
-               "drilldown" : "Jaldhar H. Vyas",
-               "name" : "Jaldhar H. Vyas"
-            },
-            {
-               "y" : 7,
-               "drilldown" : "Joelle Maslak",
-               "name" : "Joelle Maslak"
-            },
-            {
-               "name" : "Kevin Colyer",
-               "drilldown" : "Kevin Colyer",
-               "y" : 2
-            },
-            {
-               "name" : "Kian-Meng Ang",
-               "drilldown" : "Kian-Meng Ang",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Laurent Rosenfeld",
-               "name" : "Laurent Rosenfeld",
-               "y" : 7
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Maxim Nechaev",
-               "name" : "Maxim Nechaev"
-            },
-            {
-               "name" : "Ruben Westerberg",
-               "drilldown" : "Ruben Westerberg",
-               "y" : 4
-            },
-            {
-               "name" : "Simon Proctor",
-               "drilldown" : "Simon Proctor",
-               "y" : 1
-            },
-            {
-               "y" : 2,
-               "drilldown" : "Steven Wilson",
-               "name" : "Steven Wilson"
-            },
-            {
-               "name" : "Veesh Goldman",
-               "drilldown" : "Veesh Goldman",
-               "y" : 3
-            },
-            {
-               "name" : "Yet Ebreo",
-               "drilldown" : "Yet Ebreo",
-               "y" : 1
-            },
-            {
-               "name" : "Yozen Hernandez",
-               "drilldown" : "Yozen Hernandez",
-               "y" : 3
-            }
-         ],
-         "name" : "Perl Weekly Challenge - 009"
-      }
-   ]
+   "subtitle" : {
+      "text" : "[Champions: 24] Last updated at 2020-09-07 17:05:33 GMT"
+   }
 }
diff --git a/stats/pwc-challenge-013.json b/stats/pwc-challenge-013.json
index 535534ba37..6ea2cddabf 100644
--- a/stats/pwc-challenge-013.json
+++ b/stats/pwc-challenge-013.json
@@ -2,30 +2,152 @@
    "xAxis" : {
       "type" : "category"
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         }
-      }
-   },
-   "subtitle" : {
-      "text" : "[Champions: 27] Last updated at 2020-01-05 01:37:34 GMT"
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
+   "series" : [
+      {
+         "name" : "Perl Weekly Challenge - 013",
+         "data" : [
+            {
+               "name" : "Adam Russell",
+               "drilldown" : "Adam Russell",
+               "y" : 3
+            },
+            {
+               "name" : "Andrezgz",
+               "drilldown" : "Andrezgz",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Arne Sommer",
+               "name" : "Arne Sommer"
+            },
+            {
+               "drilldown" : "Athanasius",
+               "name" : "Athanasius",
+               "y" : 5
+            },
+            {
+               "name" : "Daniel Mantovani",
+               "drilldown" : "Daniel Mantovani",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Dave Jacoby",
+               "name" : "Dave Jacoby"
+            },
+            {
+               "name" : "Duncan C. White",
+               "drilldown" : "Duncan C. White",
+               "y" : 2
+            },
+            {
+               "y" : 3,
+               "drilldown" : "E. Choroba",
+               "name" : "E. Choroba"
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Feng Chang",
+               "name" : "Feng Chang"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Francis Whittle",
+               "name" : "Francis Whittle"
+            },
+            {
+               "y" : 3,
+               "name" : "Guillermo Ramos",
+               "drilldown" : "Guillermo Ramos"
+            },
+            {
+               "drilldown" : "Gustavo Chaves",
+               "name" : "Gustavo Chaves",
+               "y" : 2
+            },
+            {
+               "y" : 5,
+               "drilldown" : "Jaldhar H. Vyas",
+               "name" : "Jaldhar H. Vyas"
+            },
+            {
+               "y" : 6,
+               "drilldown" : "Joelle Maslak",
+               "name" : "Joelle Maslak"
+            },
+            {
+               "y" : 2,
+               "drilldown" : "Kevin Colyer",
+               "name" : "Kevin Colyer"
+            },
+            {
+               "drilldown" : "Kian-Meng Ang",
+               "name" : "Kian-Meng Ang",
+               "y" : 3
+            },
+            {
+               "y" : 6,
+               "drilldown" : "Laurent Rosenfeld",
+               "name" : "Laurent Rosenfeld"
+            },
+            {
+               "name" : "Lubos Kolouch",
+               "drilldown" : "Lubos Kolouch",
+               "y" : 2
+            },
+            {
+               "name" : "Maxim Nechaev",
+               "drilldown" : "Maxim Nechaev",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Neil Bowers",
+               "name" : "Neil Bowers",
+               "y" : 1
+            },
+            {
+               "name" : "Ozzy",
+               "drilldown" : "Ozzy",
+               "y" : 2
+            },
+            {
+               "drilldown" : "Pete Houston",
+               "name" : "Pete Houston",
+               "y" : 1
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Ruben Westerberg",
+               "name" : "Ruben Westerberg"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Simon Proctor",
+               "name" : "Simon Proctor"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Steven Wilson",
+               "name" : "Steven Wilson"
+            },
+            {
+               "y" : 1,
+               "name" : "Walt Mankowski",
+               "drilldown" : "Walt Mankowski"
+            },
+            {
+               "y" : 3,
+               "drilldown" : "Yozen Hernandez",
+               "name" : "Yozen Hernandez"
+            }
+         ],
+         "colorByPoint" : 1
       }
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 013"
-   },
+   ],
    "drilldown" : {
       "series" : [
          {
-            "name" : "Adam Russell",
             "data" : [
                [
                   "Perl",
@@ -36,19 +158,21 @@
                   1
                ]
             ],
+            "name" : "Adam Russell",
             "id" : "Adam Russell"
          },
          {
+            "name" : "Andrezgz",
             "data" : [
                [
                   "Perl",
                   2
                ]
             ],
-            "name" : "Andrezgz",
             "id" : "Andrezgz"
          },
          {
+            "id" : "Arne Sommer",
             "data" : [
                [
                   "Raku",
@@ -59,8 +183,7 @@
                   1
                ]
             ],
-            "name" : "Arne Sommer",
-            "id" : "Arne Sommer"
+            "name" : "Arne Sommer"
          },
          {
             "id" : "Athanasius",
@@ -91,8 +214,6 @@
             ]
          },
          {
-            "id" : "Dave Jacoby",
-            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -102,7 +223,9 @@
                   "Blog",
                   1
                ]
-            ]
+            ],
+            "name" : "Dave Jacoby",
+            "id" : "Dave Jacoby"
          },
          {
             "data" : [
@@ -115,6 +238,7 @@
             "id" : "Duncan C. White"
          },
          {
+            "id" : "E. Choroba",
             "data" : [
                [
                   "Perl",
@@ -125,18 +249,21 @@
                   1
                ]
             ],
-            "name" : "E. Choroba",
-            "id" : "E. Choroba"
+            "name" : "E. Choroba"
          },
          {
+            "id" : "Feng Chang",
             "data" : [
                [
                   "Perl",
                   2
+               ],
+               [
+                  "Raku",
+                  2
                ]
             ],
-            "name" : "Feng Chang",
-            "id" : "Feng Chang"
+            "name" : "Feng Chang"
          },
          {
             "id" : "Francis Whittle",
@@ -149,27 +276,26 @@
             "name" : "Francis Whittle"
          },
          {
-            "name" : "Guillermo Ramos",
+            "id" : "Guillermo Ramos",
             "data" : [
                [
                   "Perl",
                   3
                ]
             ],
-            "id" : "Guillermo Ramos"
+            "name" : "Guillermo Ramos"
          },
          {
-            "id" : "Gustavo Chaves",
-            "name" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ]
+            ],
+            "name" : "Gustavo Chaves",
+            "id" : "Gustavo Chaves"
          },
          {