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