- Added solutions by Pete Houston.

13 files changed, 840 insertions, 749 deletions

diff --git a/challenge-070/pete-houston/perl/ch-1.pl b/challenge-070/pete-houston/perl/ch-1.pl
new file mode 100644
index 0000000000..7271bffd55
--- /dev/null
+++ b/challenge-070/pete-houston/perl/ch-1.pl
@@ -0,0 +1,46 @@
+#!/usr/bin/env perl
+#===============================================================================
+#
+#        FILE: 7001.pl
+#
+#        USAGE: ./7001.pl [ string count offset ]
+#
+#  DESCRIPTION: Swap "count" characters in string with their offests
+#
+# REQUIREMENTS: Params::Util
+#      AUTHOR: Pete Houston (pete), cpan@openstrike.co.uk
+# ORGANIZATION: Openstrike
+#===============================================================================
+
+use strict;
+use warnings;
+use Params::Util '_POSINT';
+
+my ($str, $count, $offset) = get_args ();
+print chswap($str, $count, $offset) . "\n";
+
+sub get_args {
+    my ($s, $c, $o) = @ARGV;
+    unless (defined $o) {
+        warn "Not enough arguments so using defaults: 'perlandraku' 3 4\n";
+        return ('perlandraku', 3, 4);
+    }
+    die "Count must be natural number (not $c)" unless _POSINT($c);
+    die "Offset must be natural number (not $o)" unless _POSINT($o);
+    die "Offset ($o) must be not be less than count ($c)" if $o < $c;
+    my $l = length ($s);
+    die "Count of $c and offset of $o are too long for a string of length $l"
+        if $c + $o > $l;
+    return ($s, $c, $o);
+}
+
+sub chswap {
+    my ($str, $count, $offset) = @_;
+    my $wrap = $count + $offset == length $str; # Special case
+    $str .= substr ($str, 0, 1) if $wrap;
+    substr ($str, $offset, $count,
+        substr ($str, 1, $count,
+        substr ($str, ++$offset, $count)));
+    $str =~ s/^.(.*)(.)$/$2$1/ if $wrap;
+    return $str;
+}
diff --git a/challenge-070/pete-houston/perl/ch-2.pl b/challenge-070/pete-houston/perl/ch-2.pl
new file mode 100644
index 0000000000..624061a1a1
--- /dev/null
+++ b/challenge-070/pete-houston/perl/ch-2.pl
@@ -0,0 +1,34 @@
+#!/usr/bin/env perl
+#===============================================================================
+#
+#        FILE: ch7002.pl
+#
+#        USAGE: ./ch7002.pl N
+#
+#  DESCRIPTION: Gray code builder starting from N = 2
+#
+# REQUIREMENTS: Params::Util
+#        NOTES: N to be between 2 and 5 but why stop there?
+#      AUTHOR: Pete Houston (pete), cpan@openstrike.co.uk
+# ORGANIZATION: Openstrike
+#      CREATED: 20/07/20 23:16:00
+#===============================================================================
+
+use strict;
+use warnings;
+use Params::Util '_POSINT';
+
+$"    = ', ';
+my $i  = 2;
+my @gc = (0, 1, 3, 2);
+my $n  = shift;
+die "Argument ($n) is not an integer greater than 1"
+    unless _POSINT ($n) && $n >= $i;
+
+while ($i < $n) {
+    push @gc, map {$_ + 2**$i} reverse @gc;
+    $i++;
+}
+print "$n-bit Gray code is @gc\n";
+
+
diff --git a/stats/pwc-current.json b/stats/pwc-current.json
index ea6b1589ea..4ce06e894f 100644
--- a/stats/pwc-current.json
+++ b/stats/pwc-current.json
@@ -2,8 +2,6 @@
    "drilldown" : {
       "series" : [
          {
-            "id" : "Andrew Shitov",
-            "name" : "Andrew Shitov",
             "data" : [
                [
                   "Raku",
@@ -13,10 +11,11 @@
                   "Blog",
                   2
                ]
-            ]
+            ],
+            "name" : "Andrew Shitov",
+            "id" : "Andrew Shitov"
          },
          {
-            "name" : "Javier Luque",
             "data" : [
                [
                   "Perl",
@@ -31,10 +30,11 @@
                   1
                ]
             ],
+            "name" : "Javier Luque",
             "id" : "Javier Luque"
          },
          {
-            "name" : "Mohammad S Anwar",
+            "id" : "Mohammad S Anwar",
             "data" : [
                [
                   "Perl",
@@ -45,23 +45,34 @@
                   2
                ]
             ],
-            "id" : "Mohammad S Anwar"
+            "name" : "Mohammad S Anwar"
          },
          {
             "data" : [
                [
                   "Perl",
                   2
+               ]
+            ],
+            "name" : "Pete Houston",
+            "id" : "Pete Houston"
+         },
+         {
+            "name" : "Roger Bell_West",
+            "data" : [
+               [
+                  "Perl",
+                  2
                ],
                [
                   "Raku",
                   2
                ]
             ],
-            "name" : "Roger Bell_West",
             "id" : "Roger Bell_West"
          },
          {
+            "id" : "Simon Green",
             "name" : "Simon Green",
             "data" : [
                [
@@ -72,21 +83,19 @@
                   "Blog",
                   1
                ]
-            ],
-            "id" : "Simon Green"
+            ]
          },
          {
             "id" : "Simon Proctor",
-            "name" : "Simon Proctor",
             "data" : [
                [
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "name" : "Simon Proctor"
          },
          {
-            "id" : "Ulrich Rieke",
             "name" : "Ulrich Rieke",
             "data" : [
                [
@@ -97,7 +106,8 @@
                   "Raku",
                   2
                ]
-            ]
+            ],
+            "id" : "Ulrich Rieke"
          },
          {
             "id" : "Walt Mankowski",
@@ -111,52 +121,49 @@
          }
       ]
    },
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
+   },
+   "plotOptions" : {
+      "series" : {
+         "borderWidth" : 0,
+         "dataLabels" : {
+            "format" : "{point.y}",
+            "enabled" : 1
+         }
+      }
+   },
    "tooltip" : {
       "headerFormat" : "<span style='font-size:11px'>{series.name}</span><br/>",
       "followPointer" : 1,
       "pointFormat" : "<span style='color:{point.color}'>{point.name}</span>: <b>{point.y:f}</b><br/>"
    },
-   "subtitle" : {
-      "text" : "[Champions: 8] Last updated at 2020-07-21 16:43:08 GMT"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge - 070"
-   },
    "chart" : {
       "type" : "column"
    },
-   "xAxis" : {
-      "type" : "category"
+   "title" : {
+      "text" : "Perl Weekly Challenge - 070"
    },
    "legend" : {
       "enabled" : 0
    },
-   "plotOptions" : {
-      "series" : {
-         "borderWidth" : 0,
-         "dataLabels" : {
-            "format" : "{point.y}",
-            "enabled" : 1
-         }
-      }
-   },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "xAxis" : {
+      "type" : "category"
    },
    "series" : [
       {
          "data" : [
             {
                "name" : "Andrew Shitov",
-               "drilldown" : "Andrew Shitov",
-               "y" : 4
+               "y" : 4,
+               "drilldown" : "Andrew Shitov"
             },
             {
                "name" : "Javier Luque",
-               "drilldown" : "Javier Luque",
-               "y" : 5
+               "y" : 5,
+               "drilldown" : "Javier Luque"
             },
             {
                "name" : "Mohammad S Anwar",
@@ -164,14 +171,19 @@
                "y" : 4
             },
             {
-               "name" : "Roger Bell_West",
+               "y" : 2,
+               "drilldown" : "Pete Houston",
+               "name" : "Pete Houston"
+            },
+            {
+               "drilldown" : "Roger Bell_West",
                "y" : 4,
-               "drilldown" : "Roger Bell_West"
+               "name" : "Roger Bell_West"
             },
             {
                "name" : "Simon Green",
-               "y" : 3,
-               "drilldown" : "Simon Green"
+               "drilldown" : "Simon Green",
+               "y" : 3
             },
             {
                "name" : "Simon Proctor",
@@ -185,12 +197,15 @@
             },
             {
                "name" : "Walt Mankowski",
-               "y" : 2,
-               "drilldown" : "Walt Mankowski"
+               "drilldown" : "Walt Mankowski",
+               "y" : 2
             }
          ],
-         "colorByPoint" : 1,
-         "name" : "Perl Weekly Challenge - 070"
+         "name" : "Perl Weekly Challenge - 070",
+         "colorByPoint" : 1
       }
-   ]
+   ],
+   "subtitle" : {
+      "text" : "[Champions: 9] Last updated at 2020-07-21 16:48:02 GMT"
+   }
 }
diff --git a/stats/pwc-language-breakdown-summary.json b/stats/pwc-language-breakdown-summary.json
index c72fdaa5f3..fcafab263b 100644
--- a/stats/pwc-language-breakdown-summary.json
+++ b/stats/pwc-language-breakdown-summary.json
@@ -1,7 +1,45 @@
 {
+   "yAxis" : {
+      "min" : 0,
+      "title" : {
+         "text" : null
+      }
+   },
+   "tooltip" : {
+      "pointFormat" : "<b>{point.y:.0f}</b>"
+   },
+   "chart" : {
+      "type" : "column"
+   },
+   "xAxis" : {
+      "type" : "category",
+      "labels" : {
+         "style" : {
+            "fontSize" : "13px",
+            "fontFamily" : "Verdana, sans-serif"
+         }
+      }
+   },
+   "legend" : {
+      "enabled" : "false"
+   },
+   "title" : {
+      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
+   },
    "series" : [
       {
-         "name" : "Contributions",
+         "dataLabels" : {
+            "style" : {
+               "fontSize" : "13px",
+               "fontFamily" : "Verdana, sans-serif"
+            },
+            "rotation" : -90,
+            "y" : 10,
+            "align" : "right",
+            "format" : "{point.y:.0f}",
+            "color" : "#FFFFFF",
+            "enabled" : "true"
+         },
          "data" : [
             [
                "Blog",
@@ -9,55 +47,17 @@
             ],
             [
                "Perl",
-               2870
+               2872
             ],
             [
                "Raku",
                1846
             ]
          ],
-         "dataLabels" : {
-            "y" : 10,
-            "enabled" : "true",
-            "align" : "right",
-            "style" : {
-               "fontFamily" : "Verdana, sans-serif",
-               "fontSize" : "13px"
-            },
-            "color" : "#FFFFFF",
-            "format" : "{point.y:.0f}",
-            "rotation" : -90
-         }
+         "name" : "Contributions"
       }
    ],
-   "yAxis" : {
-      "min" : 0,
-      "title" : {
-         "text" : null
-      }
-   },
-   "legend" : {
-      "enabled" : "false"
-   },
-   "title" : {
-      "text" : "Perl Weekly Challenge Contributions [2019 - 2020]"
-   },
-   "tooltip" : {
-      "pointFormat" : "<b>{point.y:.0f}</b>"
-   },
    "subtitle" : {
-      "text" : "Last updated at 2020-07-21 16:43:08 GMT"
-   },
-   "xAxis" : {
-      "labels" : {
-         "style" : {
-            "fontFamily" : "Verdana, sans-serif",
-            "fontSize" : "13px"
-         }
-      },
-      "type" : "category"
-   },
-   "chart" : {
-      "type" : "column"
+      "text" : "Last updated at 2020-07-21 16:48:02 GMT"
    }
 }
diff --git a/stats/pwc-language-breakdown.json b/stats/pwc-language-breakdown.json
index d26c0d401c..e3a7660605 100644
--- a/stats/pwc-language-breakdown.json
+++ b/stats/pwc-language-breakdown.json
@@ -1,25 +1,21 @@
 {
-   "plotOptions" : {
-      "series" : {
-         "dataLabels" : {
-            "enabled" : 1,
-            "format" : "{point.y}"
-         },
-         "borderWidth" : 0
-      }
+   "subtitle" : {
+      "text" : "Click the columns to drilldown the language breakdown. Last updated at 2020-07-21 16:48:02 GMT"
+   },
+   "xAxis" : {
+      "type" : "category"
    },
    "legend" : {
       "enabled" : "false"
    },
-   "yAxis" : {
-      "title" : {
-         "text" : "Total Solutions"
-      }
+   "title" : {
+      "text" : "Perl Weekly Challenge Language"
+   },
+   "chart" : {
+      "type" : "column"
    },
    "series" : [
       {
-         "name" : "Perl Weekly Challenge Languages",
-         "colorByPoint" : "true",
          "data" : [
             {
                "drilldown" : "001",
@@ -27,44 +23,44 @@
                "name" : "#001"
             },
             {
-               "name" : "#002",
                "drilldown" : "002",
-               "y" : 109
+               "y" : 109,
+               "name" : "#002"
             },
             {
-               "drilldown" : "003",
+               "name" : "#003",
                "y" : 71,
-               "name" : "#003"
+               "drilldown" : "003"
             },
             {
-               "name" : "#004",
+               "y" : 91,
                "drilldown" : "004",
-               "y" : 91
+               "name" : "#004"
             },
             {
-               "name" : "#005",
+               "drilldown" : "005",
                "y" : 72,
-               "drilldown" : "005"
+               "name" : "#005"
             },
             {
-               "name" : "#006",
+               "y" : 52,
                "drilldown" : "006",
-               "y" : 52
+               "name" : "#006"
             },
             {
-               "name" : "#007",
                "y" : 59,
-               "drilldown" : "007"
+               "drilldown" : "007",
+               "name" : "#007"
             },
             {
-               "name" : "#008",
+               "y" : 72,
                "drilldown" : "008",
-               "y" : 72
+               "name" : "#008"
             },
             {
                "name" : "#009",
-               "y" : 68,
-               "drilldown" : "009"
+               "drilldown" : "009",
+               "y" : 68
             },
             {
                "y" : 60,
@@ -72,39 +68,39 @@
                "name" : "#010"
             },
             {
-               "drilldown" : "011",
+               "name" : "#011",
                "y" : 79,
-               "name" : "#011"
+               "drilldown" : "011"
             },
             {
-               "name" : "#012",
+               "drilldown" : "012",
                "y" : 83,
-               "drilldown" : "012"
+               "name" : "#012"
             },
             {
-               "y" : 76,
                "drilldown" : "013",
+               "y" : 76,
                "name" : "#013"
             },
             {
-               "name" : "#014",
+               "drilldown" : "014",
                "y" : 96,
-               "drilldown" : "014"
+               "name" : "#014"
             },
             {
-               "drilldown" : "015",
                "y" : 93,
+               "drilldown" : "015",
                "name" : "#015"
             },
             {
-               "drilldown" : "016",
                "y" : 66,
+               "drilldown" : "016",
                "name" : "#016"
             },
             {
+               "name" : "#017",
                "y" : 79,
-               "drilldown" : "017",
-               "name" : "#017"
+               "drilldown" : "017"
             },
             {
                "name" : "#018",
@@ -112,19 +108,19 @@
                "drilldown" : "018"
             },
             {
-               "name" : "#019",
+               "y" : 97,
                "drilldown" : "019",
-               "y" : 97
+               "name" : "#019"
             },
             {
-               "y" : 95,
                "drilldown" : "020",
+               "y" : 95,
                "name" : "#020"
             },
             {
-               "name" : "#021",
+               "drilldown" : "021",
                "y" : 67,
-               "drilldown" : "021"
+               "name" : "#021"
             },
             {
                "name" : "#022",
@@ -132,19 +128,19 @@
                "drilldown" : "022"
             },
             {
+               "name" : "#023",
                "drilldown" : "023",
-               "y" : 91,
-               "name" : "#023"
+               "y" : 91
             },
             {
-               "name" : "#024",
+               "drilldown" : "024",
                "y" : 70,
-               "drilldown" : "024"
+               "name" : "#024"
             },
             {
-               "name" : "#025",
                "drilldown" : "025",
-               "y" : 55
+               "y" : 55,
+               "name" : "#025"
             },
             {
                "drilldown" : "026",
@@ -157,29 +153,29 @@
                "y" : 58
             },
             {
-               "y" : 78,
+               "name" : "#028",
                "drilldown" : "028",
-               "name" : "#028"
+               "y" : 78
             },
             {
+               "name" : "#029",
                "drilldown" : "029",
-               "y" : 77,
-               "name" : "#029"
+               "y" : 77
             },
             {
+               "name" : "#030",
                "y" : 115,
-               "drilldown" : "030",
-               "name" : "#030"
+               "drilldown" : "030"
             },
             {
-               "name" : "#031",
+               "drilldown" : "031",
                "y" : 87,
-               "drilldown" : "031"
+               "name" : "#031"
             },
             {
-               "name" : "#032",
+               "y" : 92,
                "drilldown" : "032",
-               "y" : 92
+               "name" : "#032"
             },
             {
                "y" : 108,
@@ -188,8 +184,8 @@
             },
             {
                "name" : "#034",
-               "drilldown" : "034",
-               "y" : 62
+               "y" : 62,
+               "drilldown" : "034"
             },
             {
                "name" : "#035",
@@ -197,9 +193,9 @@
                "y" : 62
             },
             {
-               "name" : "#036",
                "drilldown" : "036",
-               "y" : 66
+               "y" : 66,
+               "name" : "#036"
             },
             {
                "y" : 65,
@@ -207,54 +203,54 @@
                "name" : "#037"
             },
             {
-               "name" : "#038",
+               "drilldown" : "038",
                "y" : 65,
-               "drilldown" : "038"
+               "name" : "#038"
             },
             {
-               "name" : "#039",
+               "drilldown" : "039",
                "y" : 60,
-               "drilldown" : "039"
+               "name" : "#039"
             },
             {
-               "name" : "#040",
                "drilldown" : "040",
-               "y" : 71
+               "y" : 71,
+               "name" : "#040"
             },
             {
+               "name" : "#041",
                "drilldown" : "041",
-               "y" : 74,
-               "name" : "#041"
+               "y" : 74
             },
             {
+               "name" : "#042",
                "y" : 88,
-               "drilldown" : "042",
-               "name" : "#042"
+               "drilldown" : "042"
             },
             {
+               "name" : "#043",
                "y" : 66,
-               "drilldown" : "043",
-               "name" : "#043"
+               "drilldown" : "043"
             },
             {
-               "name" : "#044",
                "drilldown" : "044",
-               "y" : 82
+               "y" : 82,
+               "name" : "#044"
             },
             {
-               "drilldown" : "045",
                "y" : 94,
+               "drilldown" : "045",
                "name" : "#045"
             },
             {
                "name" : "#046",
-               "drilldown" : "046",
-               "y" : 85
+               "y" : 85,
+               "drilldown" : "046"
             },
             {
                "name" : "#047",
-               "y" : 82,
-               "drilldown" : "047"
+               "drilldown" : "047",
+               "y" : 82
             },
             {
                "drilldown" : "048",
@@ -262,34 +258,34 @@
                "name" : "#048"
             },
             {
-               "name" : "#049",
                "y" : 85,
-               "drilldown" : "049"
+               "drilldown" : "049",
+               "name" : "#049"
             },
             {
-               "y" : 96,
                "drilldown" : "050",
+               "y" : 96,
                "name" : "#050"
             },
             {
+               "name" : "#051",
                "y" : 87,
-               "drilldown" : "051",
-               "name" : "#051"
+               "drilldown" : "051"
             },
             {
-               "name" : "#052",
+               "drilldown" : "052",
                "y" : 89,
-               "drilldown" : "052"
+               "name" : "#052"
             },
             {
-               "name" : "#053",
                "drilldown" : "053",
-               "y" : 99
+               "y" : 99,
+               "name" : "#053"
             },
             {
-               "drilldown" : "054",
+               "name" : "#054",
                "y" : 101,
-               "name" : "#054"
+               "drilldown" : "054"
             },
             {
                "name" : "#055",
@@ -302,24 +298,24 @@
                "y" : 93
             },
             {
-               "y" : 78,
                "drilldown" : "057",
+               "y" : 78,
                "name" : "#057"
             },
             {
-               "name" : "#058",
                "y" : 62,
-               "drilldown" : "058"
+               "drilldown" : "058",
+               "name" : "#058"
             },
             {
-               "name" : "#059",
                "drilldown" : "059",
-               "y" : 82
+               "y" : 82,
+               "name" : "#059"
             },
             {
                "name" : "#060",
-               "y" : 78,
-               "drilldown" : "060"
+               "drilldown" : "060",
+               "y" : 78
             },
             {
                "drilldown" : "061",
@@ -327,9 +323,9 @@
                "name" : "#061"
             },
             {
-               "name" : "#062",
                "drilldown" : "062",
-               "y" : 54
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@@ -342,13 +338,13 @@
                "y" : 76
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-               "drilldown" : "065"
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@@ -357,35 +353,34 @@
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-               "drilldown" : "068",
-               "name" : "#068"
+               "drilldown" : "068"
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-               "y" : 27,
+               "y" : 29,
                "drilldown" : "070"
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-         ]
+         ],
+         "name" : "Perl Weekly Challenge Languages",
+         "colorByPoint" : "true"
       }
    ],
-   "title" : {
-      "text" : "Perl Weekly Challenge Language"
-   },
-   "tooltip" : {
-      "pointFormat" : "<span style=\"color:{point.color}\">Challenge {point.name}</span>: <b>{point.y:f}</b><br/>",
-      "headerFormat" : "<span style=\"font-size:11px\"></span>",
-      "followPointer" : "true"
+   "yAxis" : {
+      "title" : {
+         "text" : "Total Solutions"
+      }
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    "drilldown" : {
       "series" : [
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-            "name" : "001",
+            "id" : "001",
             "data" : [
                [
                   "Perl",
@@ -400,9 +395,10 @@
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                ]
             ],
-            "id" : "001"
+            "name" : "001"
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             "data" : [
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@@ -417,11 +413,9 @@
                   "Blog",
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@@ -436,10 +430,11 @@
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@@ -454,9 +449,11 @@
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@@ -470,13 +467,9 @@
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@@ -490,7 +483,9 @@
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@@ -566,7 +561,6 @@
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@@ -580,10 +574,11 @@
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@@ -598,7 +593,7 @@
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@@ -637,6 +632,7 @@
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@@ -651,10 +647,11 @@
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@@ -668,12 +665,10 @@
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@@ -688,11 +683,9 @@
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@@ -706,9 +699,13 @@
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@@ -722,12 +719,9 @@
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