Week 256, solutions in Raku by ash

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diff --git a/challenge-256/ash/raku/ch-1.raku b/challenge-256/ash/raku/ch-1.raku
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+# Solution to the Task 1 of the Weekly Challenge #256
+# https://theweeklychallenge.org/blog/perl-weekly-challenge-256/#TASK1
+
+# Test run:
+# % raku ch-1.raku
+# 1
+# 0
+# 2
+
+my @tests =
+    ('ab', 'de', 'ed', 'bc'),
+    ('aa', 'ba', 'cd', 'ed'),
+    ('uv', 'qp', 'st', 'vu', 'mn', 'pq');
+
+for @tests -> @words {
+    say count-maximum-pairs(@words);
+}
+
+sub count-maximum-pairs(@words) {
+    my @rev = @words.map: *.flip;
+    my $words = (@words, @rev).Bag;
+
+    my $pairs = $words.grep: *.value == 2; # Each pair is counted twice
+    return $pairs.elems div 2;
+}
diff --git a/challenge-256/ash/raku/ch-2.raku b/challenge-256/ash/raku/ch-2.raku
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+# Solution to the Task 2 of the Weekly Challenge #256
+# https://theweeklychallenge.org/blog/perl-weekly-challenge-256/#TASK2
+
+# Test run:
+# $ raku ch-2.raku
+# a1b2c3d4
+# a1b2c345
+# a1b2c3de
+
+my @tests = 
+    ('abcd', '1234'),
+    ('abc', '12345'),
+    ('abcde', '123');
+
+for @tests -> ($str1, $str2) {
+    say merge-strings($str1, $str2);
+}
+
+sub merge-strings($str1, $str2) {
+    my $merged = ($str1.comb Z~ $str2.comb).join;
+
+    given $str1.chars - $str2.chars {
+        return $merged ~ $str1.substr($str2.chars) when * > 0;
+        return $merged ~ $str2.substr($str1.chars) when * < 0;
+        return $merged;
+    }
+}