@0
ADD UP
MOV ACC RIGHT

@1
ADD UP

MOV RIGHT DOWN
MOV RIGHT DOWN

MOV ACC   DOWN
MOV RIGHT DOWN

MOV LEFT  DOWN
MOV ACC   DOWN

MOV  999  DOWN
MOV -999  DOWN

@2
ADD UP

MOV ACC   LEFT
MOV RIGHT LEFT

MOV ACC   LEFT

@3
ADD UP
MOV ACC LEFT

@4


@5
L: ADD UP
   MOV  -1 LAST
   SUB UP
   JLZ L

   SUB 998
   MOV ACC ANY

   MOV   0 ACC

@6


@7


@8


@9
MOV -1   ACC

ADD 1
JRO UP

MOV ACC DOWN

@10


@11