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