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