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