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