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