0 0 0: before barriers
1 0 0: before barriers
0 1 0: before barriers
1 1 0: before barriers
0 0 1: before barriers
1 0 1: before barriers
0 1 1: before barriers
1 1 1: before barriers
0 0 0: between barriers
1 0 0: between barriers
0 1 0: between barriers
1 1 0: between barriers
0 0 1: between barriers
1 0 1: between barriers
0 1 1: between barriers
1 1 1: between barriers
0 0 0: after barriers
1 0 0: after barriers
0 1 0: after barriers
1 1 0: after barriers
0 0 1: after barriers
1 0 1: after barriers
0 1 1: after barriers
1 1 1: after barriers
2 0 0: before barriers
3 0 0: before barriers
2 1 0: before barriers
3 1 0: before barriers
2 0 1: before barriers
3 0 1: before barriers
2 1 1: before barriers
3 1 1: before barriers
2 0 0: between barriers
3 0 0: between barriers
2 1 0: between barriers
3 1 0: between barriers
2 0 1: between barriers
3 0 1: between barriers
2 1 1: between barriers
3 1 1: between barriers
2 0 0: after barriers
3 0 0: after barriers
2 1 0: after barriers
3 1 0: after barriers
2 0 1: after barriers
3 0 1: after barriers
2 1 1: after barriers
3 1 1: after barriers
