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