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