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