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