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