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