- Added solution by Jaldhar H. Vyas.

32 files changed, 4580 insertions, 4573 deletions

diff --git a/script/refresh-stats.sh b/script/refresh-stats.sh
index dab53b6244..6720c15f42 100644
--- a/script/refresh-stats.sh
+++ b/script/refresh-stats.sh
@@ -39,6 +39,8 @@ mv pwc-current.json stats/pwc-challenge-019.json
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-020 --current
 mv pwc-current.json stats/pwc-challenge-020.json
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-021 --current
+mv pwc-current.json stats/pwc-challenge-021.json
+fetch-pwc-stats --members members.json --guests guests.json --source challenge-022 --current
 mv pwc-current.json stats/
 
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-001 --summary
@@ -61,6 +63,7 @@ fetch-pwc-stats --members members.json --guests guests.json --source challenge-0
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-018 --master pwc-summary.json --update
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-019 --master pwc-summary.json --update
 fetch-pwc-stats --members members.json --guests guests.json --source challenge-020 --master pwc-summary.json --update
+fetch-pwc-stats --members members.json --guests guests.json --source challenge-021 --master pwc-summary.json --update
 mv pwc-summary.json stats/pwc-master-stats.json
 
 echo Now fetch current stats
diff --git a/stats/pwc-challenge-001.json b/stats/pwc-challenge-001.json
index ec7df47c3b..aad1f3f904 100644
--- a/stats/pwc-challenge-001.json
+++ b/stats/pwc-challenge-001.json
@@ -2,313 +2,10 @@
    "xAxis" : {
       "type" : "category"
    },
-   "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
-   },
-   "legend" : {
-      "enabled" : 0
-   },
-   "series" : [
-      {
-         "data" : [
-            {
-               "drilldown" : "Adam Russell",
-               "y" : 3,
-               "name" : "Adam Russell"
-            },
-            {
-               "drilldown" : "Ailbhe Tweedie",
-               "y" : 1,
-               "name" : "Ailbhe Tweedie"
-            },
-            {
-               "name" : "Alex Daniel",
-               "y" : 2,
-               "drilldown" : "Alex Daniel"
-            },
-            {
-               "drilldown" : "Andrezgz",
-               "name" : "Andrezgz",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Antonio Gamiz",
-               "y" : 2,
-               "name" : "Antonio Gamiz"
-            },
-            {
-               "y" : 2,
-               "name" : "Arpad Toth",
-               "drilldown" : "Arpad Toth"
-            },
-            {
-               "name" : "Athanasius",
-               "y" : 2,
-               "drilldown" : "Athanasius"
-            },
-            {
-               "y" : 2,
-               "name" : "Bob Kleemann",
-               "drilldown" : "Bob Kleemann"
-            },
-            {
-               "drilldown" : "Daniel Mantovani",
-               "name" : "Daniel Mantovani",
-               "y" : 1
-            },
-            {
-               "name" : "Dave Cross",
-               "y" : 3,
-               "drilldown" : "Dave Cross"
-            },
-            {
-               "y" : 2,
-               "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby"
-            },
-            {
-               "name" : "David Kayal",
-               "y" : 2,
-               "drilldown" : "David Kayal"
-            },
-            {
-               "y" : 2,
-               "name" : "Doug Schrag",
-               "drilldown" : "Doug Schrag"
-            },
-            {
-               "y" : 4,
-               "name" : "Dr James A. Smith",
-               "drilldown" : "Dr James A. Smith"
-            },
-            {
-               "name" : "Duncan C. White",
-               "y" : 2,
-               "drilldown" : "Duncan C. White"
-            },
-            {
-               "drilldown" : "Eddy HS",
-               "y" : 2,
-               "name" : "Eddy HS"
-            },
-            {
-               "drilldown" : "Finley",
-               "y" : 2,
-               "name" : "Finley"
-            },
-            {
-               "y" : 1,
-               "name" : "Fred Zinn",
-               "drilldown" : "Fred Zinn"
-            },
-            {
-               "name" : "Freddie B",
-               "y" : 2,
-               "drilldown" : "Freddie B"
-            },
-            {
-               "name" : "Gustavo Chaves",
-               "y" : 1,
-               "drilldown" : "Gustavo Chaves"
-            },
-            {
-               "y" : 2,
-               "name" : "JJ Merelo",
-               "drilldown" : "JJ Merelo"
-            },
-            {
-               "y" : 4,
-               "name" : "Jaldhar H. Vyas",
-               "drilldown" : "Jaldhar H. Vyas"
-            },
-            {
-               "drilldown" : "Jeff",
-               "y" : 2,
-               "name" : "Jeff"
-            },
-            {
-               "drilldown" : "Jeremy Carman",
-               "name" : "Jeremy Carman",
-               "y" : 2
-            },
-            {
-               "y" : 1,
-               "name" : "Jim Bacon",
-               "drilldown" : "Jim Bacon"
-            },
-            {
-               "name" : "Jo Christian Oterhals",
-               "y" : 5,
-               "drilldown" : "Jo Christian Oterhals"
-            },
-            {
-               "drilldown" : "Joelle Maslak",
-               "y" : 4,
-               "name" : "Joelle Maslak"
-            },
-            {
-               "y" : 1,
-               "name" : "John Barrett",
-               "drilldown" : "John Barrett"
-            },
-            {
-               "name" : "Juan Caballero",
-               "y" : 2,
-               "drilldown" : "Juan Caballero"
-            },
-            {
-               "y" : 2,
-               "name" : "Khalid",
-               "drilldown" : "Khalid"
-            },
-            {
-               "name" : "Kian-Meng Ang",
-               "y" : 3,
-               "drilldown" : "Kian-Meng Ang"
-            },
-            {
-               "drilldown" : "Kivanc Yazan",
-               "name" : "Kivanc Yazan",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Lars Balker",
-               "name" : "Lars Balker",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Laurent Rosenfeld",
-               "name" : "Laurent Rosenfeld",
-               "y" : 4
-            },
-            {
-               "drilldown" : "Mark Senn",
-               "y" : 2,
-               "name" : "Mark Senn"
-            },
-            {
-               "drilldown" : "Martin Mugeni",
-               "y" : 2,
-               "name" : "Martin Mugeni"
-            },
-            {
-               "drilldown" : "Neil Bowers",
-               "y" : 1,
-               "name" : "Neil Bowers"
-            },
-            {
-               "name" : "Nick Logan",
-               "y" : 4,
-               "drilldown" : "Nick Logan"
-            },
-            {
-               "drilldown" : "Oleksii Tsvietnov",
-               "y" : 2,
-               "name" : "Oleksii Tsvietnov"
-            },
-            {
-               "drilldown" : "Ozzy",
-               "name" : "Ozzy",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Pavel Jurca",
-               "name" : "Pavel Jurca",
-               "y" : 2
-            },
-            {
-               "y" : 2,
-               "name" : "Pete Houston",
-               "drilldown" : "Pete Houston"
-            },
-            {
-               "y" : 3,
-               "name" : "Philippe Bruhat",
-               "drilldown" : "Philippe Bruhat"
-            },
-            {
-               "name" : "Prajith P",
-               "y" : 1,
-               "drilldown" : "Prajith P"
-            },
-            {
-               "name" : "Sean Meininger",
-               "y" : 2,
-               "drilldown" : "Sean Meininger"
-            },
-            {
-               "drilldown" : "Simon Proctor",
-               "y" : 6,
-               "name" : "Simon Proctor"
-            },
-            {
-               "drilldown" : "Simon Reinhardt",
-               "y" : 2,
-               "name" : "Simon Reinhardt"
-            },
-            {
-               "drilldown" : "Steve Rogerson",
-               "y" : 4,
-               "name" : "Steve Rogerson"
-            },
-            {
-               "drilldown" : "Steven Wilson",
-               "name" : "Steven Wilson",
-               "y" : 2
-            },
-            {
-               "drilldown" : "Tiago Stock",
-               "y" : 1,
-               "name" : "Tiago Stock"
-            },
-            {
-               "drilldown" : "Tore Andersson",
-               "y" : 2,
-               "name" : "Tore Andersson"
-            },
-            {
-               "name" : "Veesh Goldman",
-               "y" : 1,
-               "drilldown" : "Veesh Goldman"
-            },
-            {
-               "drilldown" : "William Gilmore",
-               "name" : "William Gilmore",
-               "y" : 1
-            }
-         ],
-         "name" : "Perl Weekly Challenge - 001",
-         "colorByPoint" : 1
-      }
-   ],
-   "subtitle" : {
-      "text" : "[Champions: 53] Last updated at 2019-08-19 17:30:43 GMT"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 001"
-   },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "chart" : {
-      "type" : "column"
-   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Adam Russell",
             "data" : [
                [
                   "Perl 5",
@@ -319,38 +16,37 @@
                   1
                ]
             ],
-            "id" : "Adam Russell",
             "name" : "Adam Russell"
          },
          {
+            "name" : "Ailbhe Tweedie",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
-            "id" : "Ailbhe Tweedie",
-            "name" : "Ailbhe Tweedie"
+            "id" : "Ailbhe Tweedie"
          },
          {
+            "id" : "Alex Daniel",
             "name" : "Alex Daniel",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ],
-            "id" : "Alex Daniel"
+            ]
          },
          {
             "id" : "Andrezgz",
+            "name" : "Andrezgz",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "name" : "Andrezgz"
+            ]
          },
          {
             "data" : [
@@ -359,8 +55,8 @@
                   2
                ]
             ],
-            "id" : "Antonio Gamiz",
-            "name" : "Antonio Gamiz"
+            "name" : "Antonio Gamiz",
+            "id" : "Antonio Gamiz"
          },
          {
             "id" : "Arpad Toth",
@@ -373,36 +69,37 @@
             "name" : "Arpad Toth"
          },
          {
-            "name" : "Athanasius",
             "id" : "Athanasius",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Athanasius"
          },
          {
             "name" : "Bob Kleemann",
-            "id" : "Bob Kleemann",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Bob Kleemann"
          },
          {
-            "name" : "Daniel Mantovani",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
+            "name" : "Daniel Mantovani",
             "id" : "Daniel Mantovani"
          },
          {
+            "name" : "Dave Cross",
             "data" : [
                [
                   "Perl 5",
@@ -413,11 +110,10 @@
                   1
                ]
             ],
-            "id" : "Dave Cross",
-            "name" : "Dave Cross"
+            "id" : "Dave Cross"
          },
          {
-            "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl 5",
@@ -428,17 +124,17 @@
                   1
                ]
             ],
-            "name" : "Dave Jacoby"
+            "id" : "Dave Jacoby"
          },
          {
             "name" : "David Kayal",
-            "id" : "David Kayal",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "David Kayal"
          },
          {
             "name" : "Doug Schrag",
@@ -451,6 +147,7 @@
             "id" : "Doug Schrag"
          },
          {
+            "id" : "Dr James A. Smith",
             "name" : "Dr James A. Smith",
             "data" : [
                [
@@ -461,70 +158,70 @@
                   "Perl 6",
                   2
                ]
-            ],
-            "id" : "Dr James A. Smith"
+            ]
          },
          {
+            "id" : "Duncan C. White",
+            "name" : "Duncan C. White",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "id" : "Duncan C. White",
-            "name" : "Duncan C. White"
+            ]
          },
          {
-            "name" : "Eddy HS",
             "id" : "Eddy HS",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Eddy HS"
          },
          {
+            "name" : "Finley",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
             ],
-            "id" : "Finley",
-            "name" : "Finley"
+            "id" : "Finley"
          },
          {
-            "name" : "Fred Zinn",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
+            "name" : "Fred Zinn",
             "id" : "Fred Zinn"
          },
          {
-            "name" : "Freddie B",
             "id" : "Freddie B",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Freddie B"
          },
          {
             "id" : "Gustavo Chaves",
+            "name" : "Gustavo Chaves",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "name" : "Gustavo Chaves"
+            ]
          },
          {
+            "id" : "JJ Merelo",
             "name" : "JJ Merelo",
             "data" : [
                [
@@ -535,8 +232,7 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "JJ Merelo"
+            ]
          },
          {
             "id" : "Jaldhar H. Vyas",
@@ -553,16 +249,18 @@
             "name" : "Jaldhar H. Vyas"
          },
          {
-            "id" : "Jeff",
+            "name" : "Jeff",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
-            "name" : "Jeff"
+            "id" : "Jeff"
          },
          {
+            "id" : "Jeremy Carman",
+            "name" : "Jeremy Carman",
             "data" : [
                [
                   "Perl 5",
@@ -572,22 +270,19 @@
                   "Perl 6",
                   1
                ]
-            ],
-            "id" : "Jeremy Carman",
-            "name" : "Jeremy Carman"
+            ]
          },
          {
+            "id" : "Jim Bacon",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
-            "id" : "Jim Bacon",
             "name" : "Jim Bacon"
          },
          {
-            "name" : "Jo Christian Oterhals",
             "data" : [
                [
                   "Perl 5",
@@ -602,10 +297,11 @@
                   1
                ]
             ],
+            "name" : "Jo Christian Oterhals",
             "id" : "Jo Christian Oterhals"
          },
          {
-            "name" : "Joelle Maslak",
+            "id" : "Joelle Maslak",
             "data" : [
                [
                   "Perl 5",
@@ -616,39 +312,40 @@
                   2
                ]
             ],
-            "id" : "Joelle Maslak"
+            "name" : "Joelle Maslak"
          },
          {
             "id" : "John Barrett",
+            "name" : "John Barrett",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
-            ],
-            "name" : "John Barrett"
+            ]
          },
          {
-            "name" : "Juan Caballero",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
+            "name" : "Juan Caballero",
             "id" : "Juan Caballero"
          },
          {
+            "id" : "Khalid",
+            "name" : "Khalid",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ],
-            "id" : "Khalid",
-            "name" : "Khalid"
+            ]
          },
          {
+            "id" : "Kian-Meng Ang",
             "data" : [
                [
                   "Perl 5",
@@ -659,18 +356,17 @@
                   1
                ]
             ],
-            "id" : "Kian-Meng Ang",
             "name" : "Kian-Meng Ang"
          },
          {
             "name" : "Kivanc Yazan",
-            "id" : "Kivanc Yazan",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Kivanc Yazan"
          },
          {
             "data" : [
@@ -683,11 +379,10 @@
                   2
                ]
             ],
-            "id" : "Lars Balker",
-            "name" : "Lars Balker"
+            "name" : "Lars Balker",
+            "id" : "Lars Balker"
          },
          {
-            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl 5",
@@ -702,27 +397,28 @@
                   1
                ]
             ],
+            "name" : "Laurent Rosenfeld",
             "id" : "Laurent Rosenfeld"
          },
          {
             "name" : "Mark Senn",
-            "id" : "Mark Senn",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "id" : "Mark Senn"
          },
          {
+            "id" : "Martin Mugeni",
+            "name" : "Martin Mugeni",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ],
-            "id" : "Martin Mugeni",
-            "name" : "Martin Mugeni"
+            ]
          },
          {
             "data" : [
@@ -731,12 +427,11 @@
                   1
                ]
             ],
-            "id" : "Neil Bowers",
-            "name" : "Neil Bowers"
+            "name" : "Neil Bowers",
+            "id" : "Neil Bowers"
          },
          {
             "name" : "Nick Logan",
-            "id" : "Nick Logan",
             "data" : [
                [
                   "Perl 5",
@@ -746,27 +441,28 @@
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "id" : "Nick Logan"
          },
          {
+            "name" : "Oleksii Tsvietnov",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
             ],
-            "id" : "Oleksii Tsvietnov",
-            "name" : "Oleksii Tsvietnov"
+            "id" : "Oleksii Tsvietnov"
          },
          {
-            "name" : "Ozzy",
             "id" : "Ozzy",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
-            ]
+            ],
+            "name" : "Ozzy"
          },
          {
             "data" : [
@@ -775,20 +471,21 @@
                   2
                ]
             ],
-            "id" : "Pavel Jurca",
-            "name" : "Pavel Jurca"
+            "name" : "Pavel Jurca",
+            "id" : "Pavel Jurca"
          },
          {
-            "name" : "Pete Houston",
             "id" : "Pete Houston",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Pete Houston"
          },
          {
+            "name" : "Philippe Bruhat",
             "data" : [
                [
                   "Perl 5",
@@ -799,30 +496,30 @@
                   1
                ]
             ],
-            "id" : "Philippe Bruhat",
-            "name" : "Philippe Bruhat"
+            "id" : "Philippe Bruhat"
          },
          {
+            "name" : "Prajith P",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
-            "id" : "Prajith P",
-            "name" : "Prajith P"
+            "id" : "Prajith P"
          },
          {
-            "name" : "Sean Meininger",
+            "id" : "Sean Meininger",
             "data" : [
                [
                   "Perl 6",
                   2
                ]
             ],
-            "id" : "Sean Meininger"
+            "name" : "Sean Meininger"
          },
          {
+            "name" : "Simon Proctor",
             "data" : [
                [
                   "Perl 5",
@@ -837,18 +534,17 @@
                   2
                ]
             ],
-            "id" : "Simon Proctor",
-            "name" : "Simon Proctor"
+            "id" : "Simon Proctor"
          },
          {
-            "name" : "Simon Reinhardt",
             "id" : "Simon Reinhardt",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "name" : "Simon Reinhardt"
          },
          {
             "id" : "Steve Rogerson",
@@ -866,13 +562,13 @@
          },
          {
             "name" : "Steven Wilson",
-            "id" : "Steven Wilson",
             "data" : [
                [
                   "Perl 5",
                   2
                ]
-            ]
+            ],
+            "id" : "Steven Wilson"
          },
          {
             "data" : [
@@ -881,8 +577,8 @@
                   1
                ]
             ],
-            "id" : "Tiago Stock",
-            "name" : "Tiago Stock"
+            "name" : "Tiago Stock",
+            "id" : "Tiago Stock"
          },
          {
             "name" : "Tore Andersson",
@@ -895,25 +591,329 @@
             "id" : "Tore Andersson"
          },
          {
-            "id" : "Veesh Goldman",
             "data" : [
                [
                   "Perl 5",
                   1
                ]
             ],
-