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