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