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