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  1. or download this
    $ perl -E 'my $x = "2"; "ab" =~ /.{$x}/ and say "Matched"'
Matched
  2. or download this
    $ perl -E 'my $x = "{2}"; "ab" =~ /.$x/ and say "Matched"'
Matched
  3. or download this
    $ perl -E 'my $x = "2}"; "ab" =~ /.{$x/ and say "Matched"'
Matched