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