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