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