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