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