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Every program has at least one bug and can be shortened by at least one instruction -from which, by induction, one can deduce that every program can be reduced to one instruction which doesn't work.
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^__^
(oo)\_______
(__)\ )\/\
||----w |
|| ||
Chvt 7; sleep 2; import -display :0.0 -window root sshot1.png; chvt 1;