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