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