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