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