@1
MOV UP, ACC
MOV ACC, RIGHT
MOV ACC, DOWN

@2
MOV LEFT, DOWN

@5
MOV UP, ACC
MOV ACC, DOWN
MOV ACC, DOWN

@6
MOV UP, ACC
MOV ACC, DOWN
MOV ACC, DOWN

@8
MOV UP, NIL
N: MOV UP, ACC
JEZ O
L: SAV
SUB UP
JGZ N
MOV UP, NIL
SWP
JMP L
O: SWP
MOV ACC, DOWN

@9
L: SAV
SUB UP
JLZ N
MOV UP, ACC
JNZ S
SWP
MOV ACC, DOWN
MOV UP, NIL
N: MOV UP, ACC
JMP L
S: SWP
