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    # to squish a string
    y sssscccc;
    
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    $_ = "bookkeeper";
    y sssscccc;
    print;
    
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    tr///scccc;
    
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    tr///sc;
    
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    If the /s modifier is specified, sequences of characters
    that were transliterated to the same character are
    squashed down to a single instance of the character.