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