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