Symmetry 1
6 -> 7
7 -> 6
5 -> 4
4 -> 5
2 -> 3
3 -> 2
1 -> 0
0 -> 1
Symmetry 2
7 -> 0
6 -> 1
0 -> 6
1 -> 7
2 -> 4
5 -> 2
4 -> 3
3 -> 5
Symmetry 3
6 -> 7
7 -> 6
5 -> 4
4 -> 5
