@0
Z: MOV ANY ACC
   JEZ Z
   SWP
   MOV ACC RIGHT

@1
MOV LEFT ACC
SWP
MOV ACC  ANY
MOV ACC  RIGHT

@2
MOV UP   ACC
MOV ACC  LAST
MOV LEFT LAST #2
SWP

MOV ACC  LAST
MOV LEFT LAST #0
SWP

MOV ACC  LAST
MOV LEFT ANY  #1
SWP

@3


@4


@5


@6
   SUB UP
   JGZ G
   NEG
G: MOV ACC DOWN

   MOV UP  ACC

@7


@8


@9


@10
MOV ACC  DOWN
MOV -998 ACC

SUB LAST #0
SUB ANY  #1
SUB LAST #2

ADD 999