- Added solutions by David Santiago.

16 files changed, 1431 insertions, 1395 deletions

diff --git a/challenge-143/david-santiago/raku/ch-1.raku b/challenge-143/david-santiago/raku/ch-1.raku
new file mode 100755
index 0000000000..65553e4fcd
--- /dev/null
+++ b/challenge-143/david-santiago/raku/ch-1.raku
@@ -0,0 +1,5 @@
+use MONKEY-SEE-NO-EVAL;
+
+sub MAIN($expression) {
+    say EVAL $expression;
+}
diff --git a/challenge-143/david-santiago/raku/ch-2.raku b/challenge-143/david-santiago/raku/ch-2.raku
new file mode 100755
index 0000000000..60007ddf5c
--- /dev/null
+++ b/challenge-143/david-santiago/raku/ch-2.raku
@@ -0,0 +1,16 @@
+#!/usr/bin/env raku
+
+# bipronic numbers:
+# Numbers of the form x*(x+1) * y*(y+1) ("bipronics") with x and y nonnegative integers. 
+
+sub MAIN (Int $n){
+    for (1..$n/2.ceiling) -> $a {
+	for (1..$a) -> $b {
+	    if $a*($a+1) * $b*($b+1) == $n {
+		say "Yes";
+		return;
+	    }
+	}
+    }  
+    say "No";
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index eec2b4e797..8f2c594537 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,33 +1,54 @@
 {
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         }
+      }
+   },
+   "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
+   },
+   "title" : {
+      "text" : "The Weekly Challenge - 143"
+   },
    "series" : [
       {
          "name" : "The Weekly Challenge - 143",
-         "colorByPoint" : 1,
          "data" : [
             {
-               "y" : 2,
                "drilldown" : "Alexander Pankoff",
+               "y" : 2,
                "name" : "Alexander Pankoff"
             },
             {
+               "y" : 3,
                "name" : "Dave Jacoby",
-               "drilldown" : "Dave Jacoby",
-               "y" : 3
+               "drilldown" : "Dave Jacoby"
+            },
+            {
+               "name" : "David Santiago",
+               "y" : 2,
+               "drilldown" : "David Santiago"
             },
             {
-               "name" : "E. Choroba",
                "drilldown" : "E. Choroba",
-               "y" : 2
+               "y" : 2,
+               "name" : "E. Choroba"
             },
             {
                "y" : 6,
-               "drilldown" : "Flavio Poletti",
-               "name" : "Flavio Poletti"
+               "name" : "Flavio Poletti",
+               "drilldown" : "Flavio Poletti"
             },
             {
                "name" : "Laurent Rosenfeld",
-               "drilldown" : "Laurent Rosenfeld",
-               "y" : 5
+               "y" : 5,
+               "drilldown" : "Laurent Rosenfeld"
             },
             {
                "name" : "Luca Ferrari",
@@ -35,9 +56,9 @@
                "drilldown" : "Luca Ferrari"
             },
             {
-               "drilldown" : "Mohammad S Anwar",
+               "name" : "Mohammad S Anwar",
                "y" : 1,
-               "name" : "Mohammad S Anwar"
+               "drilldown" : "Mohammad S Anwar"
             },
             {
                "drilldown" : "Olivier Delouya",
@@ -50,9 +71,9 @@
                "drilldown" : "Paulo Custodio"
             },
             {
-               "drilldown" : "Peter Campbell Smith",
                "y" : 3,
-               "name" : "Peter Campbell Smith"
+               "name" : "Peter Campbell Smith",
+               "drilldown" : "Peter Campbell Smith"
             },
             {
                "name" : "Robert DiCicco",
@@ -60,40 +81,39 @@
                "drilldown" : "Robert DiCicco"
             },
             {
-               "drilldown" : "Roger Bell_West",
                "y" : 4,
-               "name" : "Roger Bell_West"
+               "name" : "Roger Bell_West",
+               "drilldown" : "Roger Bell_West"
             },
             {
+               "y" : 2,
                "name" : "Ulrich Rieke",
-               "drilldown" : "Ulrich Rieke",
-               "y" : 2
+               "drilldown" : "Ulrich Rieke"
             },
             {
                "drilldown" : "W. Luis Mochan",
                "y" : 3,
                "name" : "W. Luis Mochan"
             }
-         ]
+         ],
+         "colorByPoint" : 1
       }
    ],
-   "title" : {
-      "text" : "The Weekly Challenge - 143"
-   },
    "drilldown" : {
       "series" : [
          {
+            "id" : "Alexander Pankoff",
             "name" : "Alexander Pankoff",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "id" : "Alexander Pankoff"
+            ]
          },
          {
             "id" : "Dave Jacoby",
+            "name" : "Dave Jacoby",
             "data" : [
                [
                   "Perl",
@@ -103,8 +123,17 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Dave Jacoby"
+            ]
+         },
+         {
+            "name" : "David Santiago",
+            "id" : "David Santiago",
+            "data" : [
+               [
+                  "Raku",
+                  2
+               ]
+            ]
          },
          {
             "data" : [
@@ -113,10 +142,12 @@
                   2
                ]
             ],
-            "id" : "E. Choroba",
-            "name" : "E. Choroba"
+            "name" : "E. Choroba",
+            "id" : "E. Choroba"
          },
          {
+            "name" : "Flavio Poletti",
+            "id" : "Flavio Poletti",
             "data" : [
                [
                   "Perl",
@@ -130,13 +161,11 @@
                   "Blog",
                   2
                ]
-            ],
-            "id" : "Flavio Poletti",
-            "name" : "Flavio Poletti"
+            ]
          },
          {
-            "name" : "Laurent Rosenfeld",
             "id" : "Laurent Rosenfeld",
+            "name" : "Laurent Rosenfeld",
             "data" : [
                [
                   "Perl",
@@ -153,8 +182,6 @@
             ]
          },
          {
-            "name" : "Luca Ferrari",
-            "id" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -164,40 +191,41 @@
                   "Blog",
                   3
                ]
-            ]
+            ],
+            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari"
          },
          {
-            "name" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "id" : "Mohammad S Anwar"
+            "id" : "Mohammad S Anwar",
+            "name" : "Mohammad S Anwar"
          },
          {
+            "name" : "Olivier Delouya",
+            "id" : "Olivier Delouya",
             "data" : [
                [
                   "Perl",
                   1
                ]
-            ],
-            "id" : "Olivier Delouya",
-            "name" : "Olivier Delouya"
+            ]
          },
          {
+            "name" : "Paulo Custodio",
             "id" : "Paulo Custodio",
             "data" : [
                [
                   "Perl",
                   2
                ]
-            ],
-            "name" : "Paulo Custodio"
+            ]
          },
          {
-            "name" : "Peter Campbell Smith",
             "data" : [
                [
                   "Perl",
@@ -208,6 +236,7 @@
                   1
                ]
             ],
+            "name" : "Peter Campbell Smith",
             "id" : "Peter Campbell Smith"
          },
          {
@@ -217,11 +246,12 @@
                   2
                ]
             ],
-            "id" : "Robert DiCicco",
-            "name" : "Robert DiCicco"
+            "name" : "Robert DiCicco",
+            "id" : "Robert DiCicco"
          },
          {
             "name" : "Roger Bell_West",
+            "id" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
@@ -231,8 +261,7 @@
                   "Raku",
                   2
                ]
-            ],
-            "id" : "Roger Bell_West"
+            ]
          },
          {
             "name" : "Ulrich Rieke",
@@ -249,7 +278,6 @@
             ]
          },
          {
-            "id" : "W. Luis Mochan",
             "data" : [
                [
                   "Perl",
@@ -260,35 +288,22 @@
                   1
                ]
             ],
+            "id" : "W. Luis Mochan",
             "name" : "W. Luis Mochan"
          }
       ]
    },
-   "chart" : {
-      "type" : "column"
+   "legend" : {
+      "enabled" : 0
    },
    "xAxis" : {
       "type" : "category"
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
-   "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
-   },
    "subtitle" : {
-      "text" : "[Champions: 14] Last updated at 2021-12-15 11:52:47 GMT"
+      "text" : "[Champions: 15] Last updated at 2021-12-15 20:00:01 GMT"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "yAxis" : {
       "title" : {
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index d58b8de874..ad9da0d415 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -2,6 +2,9 @@
    "title" : {
       "text" : "The Weekly Challenge Contributions [2019 - 2021]"
    },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
+   },
    "series" : [
       {
          "data" : [
@@ -15,49 +18,46 @@
             ],
             [
                "Raku",
-               4158
+               4160
             ]
          ],
          "dataLabels" : {
             "enabled" : "true",
             "y" : 10,
+            "rotation" : -90,
+            "format" : "{point.y:.0f}",
+            "align" : "right",
             "style" : {
                "fontFamily" : "Verdana, sans-serif",
                "fontSize" : "13px"
             },
-            "rotation" : -90,
-            "align" : "right",
-            "format" : "{point.y:.0f}",
             "color" : "#FFFFFF"
          },
          "name" : "Contributions"
       }
    ],
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
    "legend" : {
       "enabled" : "false"
    },
+   "chart" : {
+      "type" : "column"
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2021-12-15 20:00:01 GMT"
+   },
    "xAxis" : {
-      "type" : "category",
       "labels" : {
          "style" : {
             "fontFamily" : "Verdana, sans-serif",
             "fontSize" : "13px"
          }
-      }
-   },
-   "chart" : {
-      "type" : "column"
+      },
+      "type" : "category"
    },
    "yAxis" : {
       "title" : {
          "text" : null
       },
       "min" : 0
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2021-12-15 11:52:47 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index ea7ab624f2..7a00a4f80b 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -2,6 +2,8 @@
    "drilldown" : {
       "series" : [
          {
+            "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -15,12 +17,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "001",
-            "name" : "001"
+            ]
          },
          {
-            "id" : "002",
             "data" : [
                [
                   "Perl",
@@ -35,11 +34,10 @@
                   10
                ]
             ],
-            "name" : "002"
+            "name" : "002",
+            "id" : "002"
          },
          {
-            "name" : "003",
-            "id" : "003",
             "data" : [
                [
                   "Perl",
@@ -53,9 +51,12 @@
                   "Blog",
                   9
                ]
-            ]
+            ],
+            "name" : "003",
+            "id" : "003"
          },
          {
+            "name" : "004",
             "id" : "004",
             "data" : [
                [
@@ -70,11 +71,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "004"
+            ]
          },
          {
             "id" : "005",
+            "name" : "005",
             "data" : [
                [
                   "Perl",
@@ -88,12 +89,11 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "005"
+            ]
          },
          {
-            "name" : "006",
             "id" : "006",
+            "name" : "006",
             "data" : [
                [
                   "Perl",
@@ -110,6 +110,7 @@
             ]
          },
          {
+            "id" : "007",
             "name" : "007",
             "data" : [
                [
@@ -124,12 +125,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "007"
+            ]
          },
          {
-            "name" : "008",
             "id" : "008",
+            "name" : "008",
             "data" : [
                [
                   "Perl",
@@ -146,7 +146,6 @@
             ]
          },
          {
-            "id" : "009",
             "data" : [
                [
                   "Perl",
@@ -161,7 +160,8 @@
                   13
                ]
             ],
-            "name" : "009"
+            "name" : "009",
+            "id" : "009"
          },
          {
             "data" : [
@@ -250,11 +250,10 @@
                   15
                ]
             ],
-            "id" : "014",
-            "name" : "014"
+            "name" : "014",
+            "id" : "014"
          },
          {
-            "name" : "015",
             "data" : [
                [
                   "Perl",
@@ -269,10 +268,12 @@
                   15
                ]
             ],
-            "id" : "015"
+            "id" : "015",
+            "name" : "015"
          },
          {
             "name" : "016",
+            "id" : "016",
             "data" : [
                [
                   "Perl",
@@ -286,11 +287,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "016"
+            ]
          },
          {
-            "id" : "017",
             "data" : [
                [
                   "Perl",
@@ -305,7 +304,8 @@
                   12
                ]
             ],
-            "name" : "017"
+            "name" : "017",
+            "id" : "017"
          },
          {
             "name" : "018",
@@ -326,6 +326,8 @@
             ]
          },
          {
+            "name" : "019",
+            "id" : "019",
             "data" : [
                [
                   "Perl",
@@ -339,12 +341,9 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "019",
-            "name" : "019"
+            ]
          },
          {
-            "name" : "020",
             "data" : [
                [
                   "Perl",
@@ -359,10 +358,10 @@
                   13
                ]
             ],
-            "id" : "020"
+            "id" : "020",
+            "name" : "020"
          },
          {
-            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -377,10 +376,12 @@
                   10
                ]
             ],
+            "id" : "021",
             "name" : "021"
          },
          {
             "id" : "022",
+            "name" : "022",
             "data" : [
                [
                   "Perl",
@@ -394,12 +395,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "022"
+            ]
          },
          {
-            "name" : "023",
-            "id" : "023",
             "data" : [
                [
                   "Perl",
@@ -413,9 +411,13 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "023",
+            "name" : "023"
          },
          {
+            "id" : "024",
+            "name" : "024",
             "data" : [
                [
                   "Perl",
@@ -429,12 +431,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "024",
-            "name" : "024"
+            ]
          },
          {
-            "name" : "025",
             "data" : [
                [
                   "Perl",
@@ -449,6 +448,7 @@
                   12
                ]
             ],
+            "name" : "025",
             "id" : "025"
          },
          {
@@ -470,6 +470,7 @@
             "name" : "026"
          },
          {
+            "id" : "027",
             "name" : "027",
             "data" : [
                [
@@ -484,10 +485,11 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "027"
+            ]
          },
          {
+            "id" : "028",
+            "name" : "028",
             "data" : [
                [
                   "Perl",
@@ -501,12 +503,11 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "028",
-            "name" : "028"
+            ]
          },
          {
             "id" : "029",
+            "name" : "029",
             "data" : [
                [
                   "Perl",
@@ -520,8 +521,7 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "029"
+            ]
          },
          {
             "data" : [
@@ -543,6 +543,7 @@
          },
          {
             "name" : "031",
+            "id" : "031",
             "data" : [
                [
                   "Perl",
@@ -556,12 +557,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "031"
+            ]
          },
          {
-            "name" : "032",
-            "id" : "032",
             "data" : [
                [
                   "Perl",
@@ -575,11 +573,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "032",
+            "name" : "032"
          },
          {
-            "name" : "033",
-            "id" : "033",
             "data" : [
                [
                   "Perl",
@@ -593,10 +591,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "id" : "033",
+            "name" : "033"
          },
          {
-            "id" : "034",
             "data" : [
                [
                   "Perl",
@@ -611,9 +610,11 @@
                   11
                ]
             ],
+            "id" : "034",
             "name" : "034"
          },
          {
+            "id" : "035",
             "name" : "035",
             "data" : [
                [
@@ -628,10 +629,11 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "035"
+            ]
          },
          {
+            "name" : "036",
+            "id" : "036",
             "data" : [
                [
                   "Perl",
@@ -645,12 +647,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "036",
-            "name" : "036"
+            ]
          },
          {
-            "id" : "037",
             "data" : [
                [
                   "Perl",
@@ -665,9 +664,12 @@
                   9
                ]
             ],
+            "id" : "037",
             "name" : "037"
          },
          {
+            "id" : "038",
+            "name" : "038",
             "data" : [
                [
                   "Perl",
@@ -681,13 +683,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "038",
-            "name" : "038"
+            ]
          },
          {
-            "name" : "039",
-            "id" : "039",
             "data" : [
                [
                   "Perl",
@@ -701,10 +699,13 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "039",
+            "id" : "039"
          },
          {
             "name" : "040",
+            "id" : "040",
             "data" : [
                [
                   "Perl",
@@ -718,10 +719,11 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "040"
+            ]
          },
          {
+            "id" : "041",
+            "name" : "041",
             "data" : [
                [
                   "Perl",
@@ -735,11 +737,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "id" : "041",
-            "name" : "041"
+            ]
          },
          {
+            "id" : "042",
             "name" : "042",
             "data" : [
                [
@@ -754,10 +755,11 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "042"
+            ]
          },
          {
+            "id" : "043",
+            "name" : "043",
             "data" : [
                [
                   "Perl",
@@ -771,13 +773,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "043",
-            "name" : "043"
+            ]
          },
          {
-            "name" : "044",
-            "id" : "044",
             "data" : [
                [
                   "Perl",
@@ -791,10 +789,13 @@
                   "Blog",
                   11
                ]
-            ]
+            ],
+            "id" : "044",
+            "name" : "044"
          },
          {
             "name" : "045",
+            "id" : "045",
             "data" : [
                [
                   "Perl",
@@ -808,11 +809,9 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "045"
+            ]
          },
          {
-            "name" : "046",
             "data" : [
                [
                   "Perl",
@@ -827,10 +826,10 @@
                   10
                ]
             ],
-            "id" : "046"
+            "id" : "046",
+            "name" : "046"
          },
          {
-            "name" : "047",
             "data" : [
                [
                   "Perl",
@@ -845,9 +844,12 @@
                   10
                ]
             ],
-            "id" : "047"
+            "id" : "047",
+            "name" : "047"
          },
          {
+            "id" : "048",
+            "name" : "048",
             "data" : [
                [
                   "Perl",
@@ -861,12 +863,11 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "048",
-            "name" : "048"
+            ]
          },
          {
             "name" : "049",
+            "id" : "049",
             "data" : [
                [
                   "Perl",
@@ -880,12 +881,9 @@
                   "Blog",
                   12
                ]
-            ],
-            "id" : "049"
+            ]
          },
          {
-            "name" : "050",
-            "id" : "050",
             "data" : [
                [
                   "Perl",
@@ -899,9 +897,13 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "050",
+            "name" : "050"
          },
          {
+            "name" : "051",
+            "id" : "051",
             "data" : [
                [
                   "Perl",
@@ -915,9 +917,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "051",
-            "name" : "051"
+            ]
          },
          {
             "data" : [
@@ -938,7 +938,6 @@
             "name" : "052"
          },
          {
-            "id" : "053",
             "data" : [
                [
                   "Perl",
@@ -953,11 +952,10 @@
                   15
                ]
             ],
+            "id" : "053",
             "name" : "053"
          },
          {
-            "name" : "054",
-            "id" : "054",
             "data" : [
                [
                   "Perl",
@@ -971,9 +969,12 @@
                   "Blog",
                   18
                ]
-            ]
+            ],
+            "id" : "054",
+            "name" : "054"
          },
          {
+            "id" : "055",
             "name" : "055",
             "data" : [
                [
@@ -988,8 +989,7 @@
                   "Blog",
                   14
                ]
-            ],
-            "id" : "055"
+            ]
          },
          {
             "data" : [
@@ -1006,12 +1006,12 @@
                   16
                ]
             ],
-            "id" : "056",
-            "name" : "056"
+            "name" : "056",
+            "id" : "056"
          },
          {
-            "name" : "057",
             "id" : "057",
+            "name" : "057",