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