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