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