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  1. or download this
    $ perl -Mstrict -wE 'my $str = "foobar"; say 1 if $str =~ /{,3}/; say 
+$]'
5.028002
$
  2. or download this
    >perl -Mstrict -wE "my $str = 'foobar'; say 1 if $str =~ /{,3}/; say $
+],':',$^O"
5.032001:MSWin32