@0
   JRO UP
T3:MOV LEFT DOWN!
T1:MOV UP   DOWN
   JMP 3
T2:MOV LEFT NIL!
   MOV UP   NIL
3: MOV 5    DOWN
   MOV UP   DOWN

@1
MOV 4   UP
MOV ANY NIL

@2
MOV UP DOWN

@3
# T1
#2...
#5 1 1 0 3 2 3 0 3
#      V       V

# T2
#4(4)3...
#0   0 0 5 3 0
#V . V V 5^^ V

# T3
#1 4 2...
#0 4 0 0 4 5 0 2 0
#V < V V ^ 5 V ^ V

@4
   JNZ N
   MOV 5 ANY
   MOV 1 LAST
   MOV 1 LAST
   ADD 1
N: MOV 3 LAST
   MOV 2 LAST
   MOV 3 LAST

@5
MOV ANY DOWN

@6
   JLZ L
   MOV 0 LEFT
   ADD 1
   MOV 0 LEFT
   MOV 0 LEFT
L: NEG