;This solution is for ;Gustein, Alan ;Poutivski, Boris ;Thille, Kyle ;13 tuples 0 * * r 0 0 _ _ l sub1 sub1 0 0 l sub1 sub1 # # _ delete delete * _ r delete delete _ _ _ halt sub1 1 0 r sub2 sub2 0 1 r sub2 sub2 _ _ _ add1 add1 * * l add1 add1 # # l add2 add2 1 0 l add2 add2 * 1 r 0