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