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