0 1 _ r 1 
1 1 1 r 1 
1 _ 1 r 2 
2 _ _ l 3 
3 1 1 l 3 
3 _ _ r 0 
2 1 1 l 4 
4 1 _ l 5 
5 1 1 l 5 
5 _ 1 s 6