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