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