0(0,6):  0  [ic,i1]  0  1   (*,*)  (2,*)  0  e
1(1,6):  0  [ic,i1]  1  0   (*,*)  (2,*)  0  e
2(2,4):  1  [C+,r1]  3  2   (*,*)  (0,1)  2  2
3(3,3):  2  [C-,ic]  2  3   (*,*)  (*,*)  2  1,2,1