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