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