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