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