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