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