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