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