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diff --git a/challenge-282/jo-37/perl/ch-1.pl b/challenge-282/jo-37/perl/ch-1.pl
new file mode 100755
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+++ b/challenge-282/jo-37/perl/ch-1.pl
@@ -0,0 +1,64 @@
+#!/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] [N]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+N
+    a number (or string)
+
+EOS
+
+
+### Input and Output
+
+say good_integer(shift) // -1;
+
+
+### Implementation
+#
+# For details see:
+# https://github.sommrey.de/the-bears-den/2024/08/16/ch-282.html#task-1
+
+
+sub good_integer {
+    (shift =~ /((.)(?<!(?=\2)..)\2{2})(?!\2)/)[0];
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        is good_integer(12344456), 444, 'example 1';
+        is good_integer(1233334), U(), 'example 2';
+        is good_integer(10020003), '000', 'example 3';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        is good_integer(1112), 111, 'at start';
+        is good_integer(1222), 222, 'at end';
+        is good_integer(111), 111, 'completely good';
+        is good_integer('abbbaa'), 'bbb', 'not a number';
+        is good_integer(122234445), 222, 'pick the first match';
+	}
+
+    done_testing;
+    exit;
+}