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