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$s = undef;
@a = ();
%h = ();
$ perl -MDevel::Peek -e'
$s = "abc"; Dump $s;
REFCNT = 1
FLAGS = () <-- Var is undefined
PV = 0 <-- undef freed the buffer
Throwing nuclear weapons into the sun
Making everybody on Earth disappear
A threat from an alien with a mighty robot
A new technology or communications medium
Providing a magic fish to a Miss Universe
Establishing a Group mind
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