.i 2 
.o 1
.r off1 
-1  off1 off1 0
10  off1 off1 0
00  off1 off0 0
-1  off0 off0 0
00  off0 off0 0
10  off0 on1  0
-1  on1  on1  1
10  on1  on1  1
00  on1  on0  1
-1  on0  on0  1
00  on0  on0  1
10  on0  off1 1
