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