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-rw-r--r--challenge-118/abigail/perl/ch-1.pl2
1 files changed, 1 insertions, 1 deletions
diff --git a/challenge-118/abigail/perl/ch-1.pl b/challenge-118/abigail/perl/ch-1.pl
index 99df6f0f65..51892d3f65 100644
--- a/challenge-118/abigail/perl/ch-1.pl
+++ b/challenge-118/abigail/perl/ch-1.pl
@@ -23,4 +23,4 @@ use experimental 'lexical_subs';
# using a pattern turns it into a one liner.
#
-say sprintf ("%b" => $_) =~ /^(([01])(?1)\g{2}|[01]?)$/ || 0 while <>;
+say sprintf ("%b" => $_) =~ /^([01]?|([01])(?1)\g{2})$/ || 0 while <>;