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