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