P0 P1 commA (high=2) 0 1 2 3 4 5 6 7 8 P2 P3 commB (high=1) 0 1 2 6 5 4 3 Case 2 P0 P1 commA' (high=2) 0 1 2 3 4 5 6 7 8 P2 P3 commB' (high=1) 0 1 2 6 5 4 3 intercomm create merge step 1 P2 P3 P0 P1 merge step 2 P2 P3 P0 P1 0 2 3 4 5 6 1 12 13 14 15 11 10 9 8 7 false true 50 1.0 cm false 10 0 true true true 2.0.8 1867 1176 53 24 0.922335297268345 true true true 138