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  1. or download this
    $ perl -E 'say("X\n\t99\n\tY" =~ /(?<=X).*\d+(?=Y)/s ? 1 : 0)'
    0
    
  2. or download this
    $ perl -E 'say("X\n\t99\n\tY" =~ /(?<=X).*\d+.*(?=Y)/s ? 1 : 0)'
    1