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