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