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