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