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