http://www.perlmonks.org?node_id=828253


in reply to Re^2: packing and unpacking
in thread packing and unpacking

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.)

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