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