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