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  1. or download this
    c:\@Work\Perl\monks>perl -wMstrict -le
    "print qq{perl version: $]};
    ...
    'ab8b9d' -> all:(a b9 d) -> 2:(b8 b9)
    'abxd' -> all:(a bx d) -> 2:(bx)
    'ad' -> all:() -> 2:()