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