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