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