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