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