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