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