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