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