init:
INBOX
COPYTO   8
COPYFROM 9
COPYTO   0
COPYTO   1
BUMPUP   1

out:
COPYFROM 1
OUTBOX

main:
COPYFROM 1
ADD      0
COPYTO   2
COPYFROM 1
COPYTO   0
COPYFROM 2
COPYTO   1
SUB      8
JUMPN    out
JUMPZ    out
JUMP     init