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