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