- Added solutions by Roger Bell_West.

13 files changed, 1196 insertions, 1108 deletions

diff --git a/challenge-069/roger-bell-west/perl/ch-2.pl b/challenge-069/roger-bell-west/perl/ch-2.pl
new file mode 100755
index 0000000000..a254375183
--- /dev/null
+++ b/challenge-069/roger-bell-west/perl/ch-2.pl
@@ -0,0 +1,47 @@
+#! /usr/bin/perl
+
+use strict;
+use warnings;
+
+use List::Util qw(min);
+
+my $s=30;
+my $l=2**$s-1;
+
+my $pos=1;
+my $seq=4;
+while (1) {
+  my $p1=$seq-1;
+  my $n0=min($p1-$pos,$l-$pos);
+  print '0' x $n0;
+  $pos+=$n0;
+  if ($p1<=$l) {
+    print '1';
+    $pos++;
+  }
+  if ($pos>$l) {
+    last;
+  }
+  $seq=nextseq($seq);
+}
+print "\n";
+
+sub nextseq {
+  my $prev=shift;
+  my $c=$prev;
+  while (1) {
+    $c++;
+    my $t=$c-1;
+    while (1) {
+      my $r=int($t/2);
+      if ($t % 2 != 0) {
+        last;
+      }
+      $t=$r;
+    }
+    if ($t % 4 == 3) {
+      last;
+    }
+  }
+  return $c;
+}
diff --git a/challenge-069/roger-bell-west/raku/ch-2.p6 b/challenge-069/roger-bell-west/raku/ch-2.p6
new file mode 100755
index 0000000000..65a1befc84
--- /dev/null
+++ b/challenge-069/roger-bell-west/raku/ch-2.p6
@@ -0,0 +1,41 @@
+#! /usr/bin/perl6
+
+my $s=30;
+my $l=2**$s-1;
+
+my $pos=1;
+my $seq=4;
+while (1) {
+  my $p1=$seq-1;
+  my $n0=min($p1-$pos,$l-$pos);
+  print '0' x $n0;
+  $pos+=$n0;
+  if ($p1 <= $l) {
+    print '1';
+    $pos++;
+  }
+  if ($pos > $l) {
+    last;
+  }
+  $seq=nextseq($seq);
+}
+print "\n";
+
+sub nextseq ($prev) {
+  my $c=$prev;
+  while (1) {
+    $c++;
+    my $t=$c-1;
+    while (1) {
+      my $r=truncate($t/2);
+      if ($t % 2 != 0) {
+        last;
+      }
+      $t=$r;
+    }
+    if ($t % 4 == 3) {
+      last;
+    }
+  }
+  return $c;
+}
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index f5449d4588..c7775750d2 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -1,53 +1,26 @@
 {
-   "series" : [
-      {
-         "data" : [
-            {
-               "y" : 2,
-               "name" : "Andrew Shitov",
-               "drilldown" : "Andrew Shitov"
-            },
-            {
-               "drilldown" : "Javier Luque",
-               "y" : 5,
-               "name" : "Javier Luque"
-            },
-            {
-               "name" : "Luca Ferrari",
-               "y" : 4,
-               "drilldown" : "Luca Ferrari"
-            },
-            {
-               "y" : 2,
-               "name" : "Roger Bell_West",
-               "drilldown" : "Roger Bell_West"
-            },
-            {
-               "name" : "Simon Miner",
-               "y" : 1,
-               "drilldown" : "Simon Miner"
-            }
-         ],
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 069"
-      }
-   ],
-   "xAxis" : {
-      "type" : "category"
+   "chart" : {
+      "type" : "column"
    },
-   "legend" : {
-      "enabled" : 0
+   "subtitle" : {
+      "text" : "[Champions: 5] Last updated at 2020-07-13 17:36:31 GMT"
    },
    "yAxis" : {
       "title" : {
          "text" : "Total Solutions"
       }
    },
-   "chart" : {
-      "type" : "column"
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
    },
-   "subtitle" : {
-      "text" : "[Champions: 5] Last updated at 2020-07-13 17:08:02 GMT"
+   "xAxis" : {
+      "type" : "category"
    },
    "title" : {
       "text" : "Perl Weekly Challenge - 069"
@@ -69,6 +42,7 @@
             "id" : "Andrew Shitov"
          },
          {
+            "name" : "Javier Luque",
             "id" : "Javier Luque",
             "data" : [
                [
@@ -83,11 +57,10 @@
                   "Blog",
                   1
                ]
-            ],
-            "name" : "Javier Luque"
+            ]
          },
          {
-            "id" : "Luca Ferrari",
+            "name" : "Luca Ferrari",
             "data" : [
                [
                   "Raku",
@@ -98,46 +71,73 @@
                   2
                ]
             ],
-            "name" : "Luca Ferrari"
+            "id" : "Luca Ferrari"
          },
          {
+            "name" : "Roger Bell_West",
             "data" : [
                [
                   "Perl",
-                  1
+                  2
                ],
                [
                   "Raku",
-                  1
+                  2
                ]
             ],
-            "id" : "Roger Bell_West",
-            "name" : "Roger Bell_West"
+            "id" : "Roger Bell_West"
          },
          {
-            "name" : "Simon Miner",
+            "id" : "Simon Miner",
             "data" : [
                [
                   "Perl",
                   1
                ]
             ],
-            "id" : "Simon Miner"
+            "name" : "Simon Miner"
          }
       ]
    },
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
-   },
    "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/>"
-   }
+      "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
+      "followPointer" : 1
+   },
+   "legend" : {
+      "enabled" : 0
+   },
+   "series" : [
+      {
+         "colorByPoint" : 1,
+         "name" : "Perl Weekly Challenge - 069",
+         "data" : [
+            {
+               "name" : "Andrew Shitov",
+               "y" : 2,
+               "drilldown" : "Andrew Shitov"
+            },
+            {
+               "name" : "Javier Luque",
+               "drilldown" : "Javier Luque",
+               "y" : 5
+            },
+            {
+               "y" : 4,
+               "drilldown" : "Luca Ferrari",
+               "name" : "Luca Ferrari"
+            },
+            {
+               "name" : "Roger Bell_West",
+               "y" : 4,
+               "drilldown" : "Roger Bell_West"
+            },
+            {
+               "name" : "Simon Miner",
+               "drilldown" : "Simon Miner",
+               "y" : 1
+            }
+         ]
+      }
+   ]
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index cc011aa093..4752358706 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,31 +1,36 @@
 {
-   "legend" : {
-      "enabled" : "false"
+   "chart" : {
+      "type" : "column"
+   },
+   "subtitle" : {
+      "text" : "Last updated at 2020-07-13 17:36:31 GMT"
+   },
+   "yAxis" : {
+      "title" : {
+         "text" : null
+      },
+      "min" : 0
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
    },
    "xAxis" : {
-      "type" : "category",
       "labels" : {
          "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
          }
-      }
+      },
+      "type" : "category"
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
+   },
+   "legend" : {
+      "enabled" : "false"
    },
    "series" : [
       {
-         "dataLabels" : {
-            "style" : {
-               "fontSize" : "13px",
-               "fontFamily" : "Verdana, sans-serif"
-            },
-            "y" : 10,
-            "color" : "#FFFFFF",
-            "align" : "right",
-            "format" : "{point.y:.0f}",
-            "enabled" : "true",
-            "rotation" : -90
-         },
-         "name" : "Contributions",
          "data" : [
             [
                "Blog",
@@ -33,31 +38,26 @@
             ],
             [
                "Perl",
-               2823
+               2824
             ],
             [
                "Raku",
-               1813
+               1814
             ]
-         ]
-      }
-   ],
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
+         ],
+         "name" : "Contributions",
+         "dataLabels" : {
+            "align" : "right",
+            "format" : "{point.y:.0f}",
+            "rotation" : -90,
+            "color" : "#FFFFFF",
+            "y" : 10,
+            "enabled" : "true",
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            }
+         }
       }
-   },
-   "chart" : {
-      "type" : "column"
-   },
-   "subtitle" : {
-      "text" : "Last updated at 2020-07-13 17:08:02 GMT"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
-   }
+   ]
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index c125b11f91..0d18cc24d5 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,27 +1,24 @@
 {
-   "chart" : {
-      "type" : "column"
+   "xAxis" : {
+      "type" : "category"
    },
-   "subtitle" : {
-      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-07-13 17:08:02 GMT"
+   "plotOptions" : {
+      "series" : {
+         "dataLabels" : {
+            "enabled" : 1,
+            "format" : "{point.y}"
+         },
+         "borderWidth" : 0
+      }
    },
    "title" : {
       "text" : "Perl Weekly Challenge Language"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
-   },
-   "tooltip" : {
-      "followPointer" : "true",
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style=\"font-size:11px\"></span>"
-   },
    "drilldown" : {
       "series" : [
          {
             "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -35,8 +32,7 @@
                   "Blog",
                   11
                ]
-            ],
-            "id" : "001"
+            ]
          },
          {
             "name" : "002",
@@ -76,6 +72,7 @@
          },
          {
             "name" : "004",
+            "id" : "004",
             "data" : [
                [
                   "Perl",
@@ -89,12 +86,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "004"
+            ]
          },
          {
-            "name" : "005",
-            "id" : "005",
             "data" : [
                [
                   "Perl",
@@ -108,7 +102,9 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "id" : "005",
+            "name" : "005"
          },
          {
             "id" : "006",
@@ -129,6 +125,8 @@
             "name" : "006"
          },
          {
+            "name" : "007",
+            "id" : "007",
             "data" : [
                [
                   "Perl",
@@ -142,12 +140,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "007",
-            "name" : "007"
+            ]
          },
          {
-            "id" : "008",
+            "name" : "008",
             "data" : [
                [
                   "Perl",
@@ -162,10 +158,9 @@
                   12
                ]
             ],
-            "name" : "008"
+            "id" : "008"
          },
          {
-            "id" : "009",
             "data" : [
                [
                   "Perl",
@@ -180,10 +175,10 @@
                   13
                ]
             ],
+            "id" : "009",
             "name" : "009"
          },
          {
-            "name" : "010",
             "data" : [
                [
                   "Perl",
@@ -198,10 +193,10 @@
                   11
                ]
             ],
-            "id" : "010"
+            "id" : "010",
+            "name" : "010"
          },
          {
-            "id" : "011",
             "data" : [
                [
                   "Perl",
@@ -216,10 +211,10 @@
                   10
                ]
             ],
+            "id" : "011",
             "name" : "011"
          },
          {
-            "id" : "012",
             "data" : [
                [
                   "Perl",
@@ -234,10 +229,12 @@
                   11
                ]
             ],
+            "id" : "012",
             "name" : "012"
          },
          {
             "name" : "013",
+            "id" : "013",
             "data" : [
                [
                   "Perl",
@@ -251,8 +248,7 @@
                   "Blog",
                   13
                ]
-            ],
-            "id" : "013"
+            ]
          },
          {
             "data" : [
@@ -291,6 +287,7 @@
             "name" : "015"
          },
          {
+            "id" : "016",
             "data" : [
                [
                   "Perl",
@@ -305,11 +302,9 @@
                   12
                ]
             ],
-            "id" : "016",
             "name" : "016"
          },
          {
-            "name" : "017",
             "id" : "017",
             "data" : [
                [
@@ -324,10 +319,10 @@
                   "Blog",
                   12
                ]
-            ]
+            ],
+            "name" : "017"
          },
          {
-            "id" : "018",
             "data" : [
                [
                   "Perl",
@@ -342,9 +337,11 @@
                   14
                ]
             ],
+            "id" : "018",
             "name" : "018"
          },
          {
+            "name" : "019",
             "id" : "019",
             "data" : [
                [
@@ -359,8 +356,7 @@
                   "Blog",
                   13
                ]
-            ],
-            "name" : "019"
+            ]
          },
          {
             "name" : "020",
@@ -382,6 +378,7 @@
          },
          {
             "name" : "021",
+            "id" : "021",
             "data" : [
                [
                   "Perl",
@@ -395,10 +392,10 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "021"
+            ]
          },
          {
+            "id" : "022",
             "data" : [
                [
                   "Perl",
@@ -413,10 +410,10 @@
                   10
                ]
             ],
-            "id" : "022",
             "name" : "022"
          },
          {
+            "name" : "023",
             "id" : "023",
             "data" : [
                [
@@ -431,11 +428,10 @@
                   "Blog",
                   12
                ]
-            ],
-            "name" : "023"
+            ]
          },
          {
-            "name" : "024",
+            "id" : "024",
             "data" : [
                [
                   "Perl",
@@ -450,9 +446,10 @@
                   11
                ]
             ],
-            "id" : "024"
+            "name" : "024"
          },
          {
+            "id" : "025",
             "data" : [
                [
                   "Perl",
@@ -467,11 +464,10 @@
                   12
                ]
             ],
-            "id" : "025",
             "name" : "025"
          },
          {
-            "id" : "026",
+            "name" : "026",
             "data" : [
                [
                   "Perl",
@@ -486,9 +482,10 @@
                   10
                ]
             ],
-            "name" : "026"
+            "id" : "026"
          },
          {
+            "name" : "027",
             "id" : "027",
             "data" : [
                [
@@ -503,8 +500,7 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "027"
+            ]
          },
          {
             "data" : [
@@ -525,7 +521,6 @@
             "name" : "028"
          },
          {
-            "id" : "029",
             "data" : [
                [
                   "Perl",
@@ -540,10 +535,10 @@
                   12
                ]
             ],
+            "id" : "029",
             "name" : "029"
          },
          {
-            "name" : "030",
             "id" : "030",
             "data" : [
                [
@@ -558,7 +553,8 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "030"
          },
          {
             "id" : "031",
@@ -579,7 +575,6 @@
             "name" : "031"
          },
          {
-            "name" : "032",
             "id" : "032",
             "data" : [
                [
@@ -594,9 +589,11 @@
                   "Blog",
                   10
                ]
-            ]
+            ],
+            "name" : "032"
          },
          {
+            "name" : "033",
             "id" : "033",
             "data" : [
                [
@@ -611,11 +608,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "name" : "033"
+            ]
          },
          {
-            "name" : "034",
             "data" : [
                [
                   "Perl",
@@ -630,9 +625,11 @@
                   11
                ]
             ],
-            "id" : "034"
+            "id" : "034",
+            "name" : "034"
          },
          {
+            "name" : "035",
             "id" : "035",
             "data" : [
                [
@@ -647,11 +644,10 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "035"
+            ]
          },
          {
-            "name" : "036",
+            "id" : "036",
             "data" : [
                [
                   "Perl",
@@ -666,7 +662,7 @@
                   11
                ]
             ],
-            "id" : "036"
+            "name" : "036"
          },
          {
             "id" : "037",
@@ -723,7 +719,7 @@
             "name" : "039"
          },
          {
-            "name" : "040",
+            "id" : "040",
             "data" : [
                [
                   "Perl",
@@ -738,9 +734,10 @@
                   10
                ]
             ],
-            "id" : "040"
+            "name" : "040"
          },
          {
+            "name" : "041",
             "id" : "041",
             "data" : [
                [
@@ -755,11 +752,9 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "041"
+            ]
          },
          {
-            "name" : "042",
             "data" : [
                [
                   "Perl",
@@ -774,10 +769,11 @@
                   11
                ]
             ],
-            "id" : "042"
+            "id" : "042",
+            "name" : "042"
          },
          {
-            "id" : "043",
+            "name" : "043",
             "data" : [
                [
                   "Perl",
@@ -792,7 +788,7 @@
                   11
                ]
             ],
-            "name" : "043"
+            "id" : "043"
          },
          {
             "name" : "044",
@@ -813,6 +809,7 @@
             ]
          },
          {
+            "id" : "045",
             "data" : [
                [
                   "Perl",
@@ -827,10 +824,10 @@
                   11
                ]
             ],
-            "id" : "045",
             "name" : "045"
          },
          {
+            "name" : "046",
             "data" : [
                [
                   "Perl",
@@ -845,11 +842,11 @@
                   10
                ]
             ],
-            "id" : "046",
-            "name" : "046"
+            "id" : "046"
          },
          {
             "name" : "047",
+            "id" : "047",
             "data" : [
                [
                   "Perl",
@@ -863,11 +860,9 @@
                   "Blog",
                   10
                ]
-            ],
-            "id" : "047"
+            ]
          },
          {
-            "name" : "048",
             "data" : [
                [
                   "Perl",
@@ -882,9 +877,11 @@
                   12
                ]
             ],
-            "id" : "048"
+            "id" : "048",
+            "name" : "048"
          },
          {
+            "name" : "049",
             "data" : [
                [
                   "Perl",
@@ -899,11 +896,10 @@
                   12
                ]
             ],
-            "id" : "049",
-            "name" : "049"
+            "id" : "049"
          },
          {
-            "id" : "050",
+            "name" : "050",
             "data" : [
                [
                   "Perl",
@@ -918,7 +914,7 @@
                   12
                ]
             ],
-            "name" : "050"
+            "id" : "050"
          },
          {
             "name" : "051",
@@ -939,6 +935,8 @@
             ]
          },
          {
+            "name" : "052",
+            "id" : "052",
             "data" : [
                [
                   "Perl",
@@ -952,9 +950,7 @@
                   "Blog",
                   14
                ]
-            ],
-            "id" : "052",
-            "name" : "052"
+            ]
          },
          {
             "id" : "053",
@@ -975,7 +971,6 @@
             "name" : "053"
          },
          {
-            "id" : "054",
             "data" : [
                [
                   "Perl",
@@ -990,10 +985,10 @@
                   18
                ]
             ],
+            "id" : "054",
             "name" : "054"
          },
          {
-            "name" : "055",
             "id" : "055",
             "data" : [
                [
@@ -1008,7 +1003,8 @@
                   "Blog",
                   14
                ]
-            ]
+            ],
+            "name" : "055"
          },
          {
             "id" : "056",
@@ -1029,7 +1025,6 @@
             "name" : "056"
          },
          {
-            "id" : "057",
             "data" : [
                [
                   "Perl",
@@ -1044,10 +1039,10 @@
                   15
                ]
             ],
+            "id" : "057",
             "name" : "057"
          },
          {
-            "id" : "058",
             "data" : [
                [
                   "Perl",
@@ -1062,10 +1057,10 @@
                   12
                ]
             ],
+            "id" : "058",
             "name" : "058"
          },
          {
-            "name" : "059",
             "id" : "059",
             "data" : [
                [
@@ -1080,7 +1075,8 @@
                   "Blog",
                   15
                ]
-            ]
+            ],
+            "name" : "059"
          },
          {
             "name" : "060",
@@ -1101,7 +1097,6 @@
             ]
          },
          {
-            "name" : "061",
             "data" : [
                [
                   "Perl",
@@ -1116,10 +1111,11 @@
                   14
                ]
             ],
-            "id" : "061"
+            "id" : "061",
+            "name" : "061"
          },
          {
-            "id" : "062",
+            "name" : "062",
             "data" : [
                [
                   "Perl",
@@ -1134,10 +1130,9 @@
                   11
                ]
             ],
-            "name" : "062"
+            "id" : "062"
          },
          {
-            "name" : "063",
             "id" : "063",
             "data" : [
                [
@@ -1152,7 +1147,8 @@
                   "Blog",
                   13
                ]
-            ]
+            ],
+            "name" : "063"
          },
          {
             "name" : "064",
@@ -1173,6 +1169,7 @@
             "id" : "064"
          },
          {
+            "name" : "065",
             "id" : "065",
             "data" : [
                [
@@ -1187,11 +1184,10 @@
                   "Blog",
                   15
                ]
-            ],
-            "name" : "065"
+            ]
          },
          {
-            "name" : "066",
+            "id" : "066",
             "data" : [
                [
                   "Perl",
@@ -1206,9 +1202,10 @@
                   13
                ]
             ],
-            "id" : "066"
+            "name" : "066"
          },
          {
+            "name" : "067",
             "data" : [
                [
                   "Perl",
@@ -1223,10 +1220,10 @@
                   17
                ]
             ],
-            "id" : "067",
-            "name" : "067"
+            "id" : "067"
          },
          {
+            "name" : "068",
             "id" : "068",
             "data" : [
                [
@@ -1241,94 +1238,90 @@
                   "Blog",
                   9
                ]
-            ],
-            "name" : "068"
+            ]
          },
          {
             "name" : "069",
-            "id" : "069",
             "data" : [
                [
                   "Perl",
-                  4
+                  5
                ],
                [
                   "Raku",
-                  6
+                  7
                ],
                [
                   "Blog",
                   4
                ]
-            ]
+            ],
+            "id" : "069"
          }
       ]
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
-      }
+   "tooltip" : {
+      "followPointer" : "true",
+      "headerFormat" : "<span style=\"font-size:11px\"></span>",
+      "pointFormat" : "<