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