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