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