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