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