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diff --git a/challenge-279/jo-37/perl/ch-1.pl b/challenge-279/jo-37/perl/ch-1.pl
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+++ b/challenge-279/jo-37/perl/ch-1.pl
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+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0;
+use experimental 'signatures';
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV == 2;
+usage: $0 [-examples] [-tests] [LETTERS WEIGHTS]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+LETTERS
+    list of letters, optionally separated by commas
+
+WEIGHTS
+    list of weights, optionally separated by commas
+
+EOS
+
+
+### Input and Output
+
+say sort_letters(map [split /,*/, $_], @ARGV);
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2024/07/26/ch-279.html#task-1
+
+
+sub sort_letters ($letters, $weights) {
+    (\my @word)->@[map $_ - 1, @$weights] = @$letters;
+    join '', @word;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is sort_letters(['R', 'E', 'P', 'L'], [3, 2, 1, 4]),
+        'PERL', 'example 1';
+
+        is sort_letters(['A', 'U', 'R', 'K'], [2, 4, 1, 3]),
+        'RAKU', 'example 2';
+
+        is sort_letters(['O', 'H', 'Y', 'N', 'P', 'T'], [5, 4, 2, 6, 1, 3]),
+        'PYTHON', 'example 3';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+	}
+
+    done_testing;
+    exit;
+}