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