2 files changed, 36 insertions, 0 deletions
diff --git a/challenge-277/alexander-karelas/perl/ch-1.pl b/challenge-277/alexander-karelas/perl/ch-1.pl
new file mode 100755
index 0000000000..c3f05073f2
--- /dev/null
+++ b/challenge-277/alexander-karelas/perl/ch-1.pl
@@ -0,0 +1,13 @@
+#!/usr/bin/env perl
+
+use v5.40;
+
+my @words1 = ("Perl", "is", "my", "friend");
+my @words2 = ("Perl", "and", "Raku", "are", "friend");
+
+# Solution:
+my %hash;
+@hash{ @words1 } = ();
+my $num_common = grep exists $hash{$_}, @words2;
+
+say $num_common;
diff --git a/challenge-277/alexander-karelas/perl/ch-2.pl b/challenge-277/alexander-karelas/perl/ch-2.pl
new file mode 100755
index 0000000000..be524997a2
--- /dev/null
+++ b/challenge-277/alexander-karelas/perl/ch-2.pl
@@ -0,0 +1,23 @@
+#!/usr/bin/env perl
+
+use v5.40;
+
+use List::Util 'min';
+
+my @ints = (1, 2, 3, 4, 5);
+
+# Solution
+sub is_strong ($x, $y) {
+    return 0 < abs($x - $y) < min($x, $y);
+}
+
+my @strong_pair_strings;
+for my $j (1 .. $#ints) {
+    my $y = $ints[$j];
+    for my $i (0 .. $j-1) {
+        my $x = $ints[$i];
+        push @strong_pair_strings, "($x, $y)" if is_strong($x, $y);
+    }
+}
+
+say "Strong pairs: ", join ', ', @strong_pair_strings;
+\ No newline at end of file