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