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