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diff --git a/challenge-190/jo-37/perl/ch-1.pl b/challenge-190/jo-37/perl/ch-1.pl
new file mode 100755
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+++ b/challenge-190/jo-37/perl/ch-1.pl
@@ -0,0 +1,67 @@
+#!/usr/bin/perl -s
+
+use v5.16;
+use Test2::V0;
+
+our ($tests, $examples);
+
+run_tests() if $tests || $examples;	# does not return
+
+die <<EOS unless @ARGV;
+usage: $0 [-examples] [-tests] [STR]
+
+-examples
+    run the examples from the challenge
+ 
+-tests
+    run some tests
+
+STR
+    String to check for appropriate capital usage
+
+EOS
+
+
+### Input and Output
+
+say 0 + !!check_caps(shift);
+
+
+### Implementation
+
+# There is no need to restrict this task to ASCII letters.  For Unicode
+# characters there are properties "Letter uppercase" and "Letter
+# lowercase".  Using these here.
+sub check_caps {
+	shift =~ /^\p{Lu}?(?:\p{Lu}*|\p{Ll}*)$/;
+}
+
+
+### Examples and tests
+
+sub run_tests {
+    SKIP: {
+        skip "examples" unless $examples;
+
+        ok  check_caps('Perl'),   'Example 1';
+        ok  check_caps('TPF'),    'Example 2';
+        ok !check_caps('PyThon'), 'Example 3';
+        ok  check_caps('raku'),   'Example 4';
+    }
+
+    SKIP: {
+        skip "tests" unless $tests;
+
+        ok  check_caps('Περλ'),   'Example 1 greek';
+        ok  check_caps('ΤΠΦ'),    'Example 2 greek';
+        ok !check_caps('ΠυΘων'),  'Example 3 greek';
+        ok  check_caps('ρακου'),  'Example 4 greek';
+        ok  check_caps('Π'),      'single uppercase';
+        ok  check_caps('ρ'),      'single lowercase';
+        ok !check_caps('1etter'), 'not a letter';
+
+	}
+
+    done_testing;
+    exit;
+}