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# The suffix +/- correspond to "matching" and "non-matching" input,
# respectively.
...
?!+   3864/s 1029%    --  -86%  -86%
?!-  26795/s 7730%  593%    --   -6%
?<!+ 28417/s 8204%  635%    6%    --

use strict;
use warnings;
...
           }
        );
__END__