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