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