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