20
18 16 13 14 15 20 12 17 11 19 
16 14 17 11 12 20 19 13 15 18 
15 16 20 11 17 18 19 14 12 13 
11 15 18 14 20 19 17 13 16 12 
12 18 15 19 13 17 16 20 11 14 
14 18 11 20 15 19 13 16 12 17 
20 18 13 12 14 17 15 19 11 16 
13 12 17 20 16 11 18 15 14 19 
14 13 19 12 15 18 20 11 17 16 
16 13 17 14 19 18 20 12 15 11 
4 9 3 2 1 6 8 10 5 7 
5 4 2 3 8 6 10 7 1 9 
6 10 9 5 7 8 4 1 3 2 
9 7 1 5 4 3 8 2 6 10 
2 5 8 3 10 1 7 6 9 4 
10 5 3 9 7 1 2 6 4 8 
3 1 4 10 9 2 8 7 6 5 
3 7 2 6 1 5 8 10 9 4 
3 5 7 9 8 10 2 1 6 4 
9 5 6 4 2 1 7 8 3 10 
forbidden 1 13
forbidden 1 15
forbidden 2 14
forbidden 2 15
forbidden 2 16
forbidden 2 18
forbidden 2 19
forbidden 3 11
forbidden 3 12
forbidden 3 17
forbidden 3 18
forbidden 4 12
forbidden 4 13
forbidden 4 14
forbidden 4 15
forbidden 4 18
forbidden 4 19
forbidden 4 20
forbidden 5 14
forbidden 5 15
forbidden 5 16
forbidden 6 11
forbidden 6 12
forbidden 6 16
forbidden 6 18
forbidden 6 20
forbidden 7 18
forbidden 7 19
forbidden 7 20
forbidden 8 11
forbidden 8 12
forbidden 8 15
forbidden 8 16
forbidden 8 17
forbidden 8 18
forbidden 8 20
forbidden 9 14
forbidden 9 19
forbidden 10 20