Actually, it produces 
\1 better written as $1 at a.pl line 3.
\2 better written as $2 at a.pl line 3.
725_275 is an entry - and will be at 423_569 -but- not at 012_457.

[download]
if you don't disable warnings. \1 and \2 are not a valid Perl variables.

In reply to Re^2: match substitution by ikegami
in thread match substitution by ShayShay

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