0 V: 0
0 E: 
1 V: 0 1
1 E: 0
2 V: 0 2
2 E: 1
3 V: 0 1 3
3 E: 0 4
4 V: 0 1 4
4 E: 0 5
5 V: 0 1 5
5 E: 0 6
6 V: 0 1 6
6 E: 0 2
pred: 0 0 0 1 1 1 1
inbe: -1 0 1 4 5 6 2