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