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