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