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