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