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