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