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