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diff --git a/challenge-278/jo-37/perl/ch-1.pl b/challenge-278/jo-37/perl/ch-1.pl
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+++ b/challenge-278/jo-37/perl/ch-1.pl
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+#!/usr/bin/perl -s
+
+use v5.24;
+use Test2::V0;
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [SHUFFLED_WORDS]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+SHUFFLED_WORDS
+    string or list of shuffled words
+
+EOS
+
+
+### Input and Output
+
+say sort_string("@ARGV");
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2024/07/19/ch-278.html#task-1
+
+
+sub sort_string {
+    join " ",
+    map $_->[0],
+    sort {$a->[1] <=> $b->[1]}
+    map [/(.+?)(\d+)$/],
+    split /\s+/, shift;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is sort_string("and2 Raku3 cousins5 Perl1 are4"),
+        "Perl and Raku are cousins", "example 1";
+
+        is sort_string("guest6 Python1 most4 the3 popular5 is2 language7"),
+        "Python is the most popular guest language", "example 2";
+
+        is sort_string("Challenge3 The1 Weekly2"),
+        "The Weekly Challenge", "example 3";
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        is sort_string("twelve12 one1 two2 eight8 six6 seven7 five5 ten10 four4 eleven11 nine9 three3"),
+        "one two three four five six seven eight nine ten eleven twelve",
+        "more than ten";
+	}
+
+    done_testing;
+    exit;
+}