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