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