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