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