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