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