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