From perldoc -f pack: 
Q   An unsigned quad value.
    (Quads are available only if your system supports 64-bit
    integer values _and_ if Perl has been compiled to support those.
    Causes a fatal error otherwise.)

[download]

(($_="Mzz ojjdloobnf jt uvy5502383")=~y~b-zg2-5c96-81~a-z0-9~s)=~s~~~s; print

In reply to Re^3: packing and unpacking by spadacciniweb
in thread packing and unpacking by ungalnanban

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