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