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