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