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