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