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