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