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