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