Human Resource Machine/Year 39

a:
    JUMP     c
b:
    ADD      15
    OUTBOX
    COPYFROM 10
    OUTBOX
c:
    COPYFROM 14
    COPYTO   10
    INBOX
d:
    SUB      15
    JUMPN    b
    COPYTO   11
    BUMPUP   10
    COPYFROM 11
    JUMP     d