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diff --git a/challenge-335/simon-proctor/raku/ch-1.raku b/challenge-335/simon-proctor/raku/ch-1.raku
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+++ b/challenge-335/simon-proctor/raku/ch-1.raku
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+#!/usr/bin/env raku
+
+multi sub MAIN(:t(:$test)) is hidden-from-USAGE {
+    use Test;
+    is common-chars("bella", "label", "roller"), ("e", "l", "l");
+    is common-chars("cool", "lock", "cook"), ("c", "o");
+    is common-chars("hello", "world", "pole"), ("l", "o");
+    is common-chars("abc", "def", "ghi"),();
+    is common-chars("aab", "aac", "aaa"),("a", "a");
+    done-testing;
+}
+
+multi sub common-chars( *@words where all(@words) ~~ Str ) {
+    common-chars(@words);
+}
+
+multi sub common-chars( @words where all(@words) ~~ Str ) {
+    return ( [(&)] @words.map( *.comb.Bag ) ).map( -> $p { |($p.key xx $p.value) } ).sort;
+}
+
+#| Given a list of strings print an orders list of the common characters
+multi sub MAIN( *@words where all(@words) ~~ Str ) {
+    common-chars(@words).join(",").say;
+}