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