-- HUMAN RESOURCE MACHINE PROGRAM --

a:
    INBOX
    JUMPZ    e
    COPYTO   4
    JUMPN    f
    OUTBOX
b:
    BUMPDN   4
    JUMPZ    c
    OUTBOX
    JUMP     b
c:
d:
e:
    OUTBOX
    JUMP     a
f:
    OUTBOX
g:
    BUMPUP   4
    JUMPZ    d
    OUTBOX
    JUMP     g