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