Inventing wheels (not serious)

[Grandmaster]

Hi,

Originally it was an optimal d design,

Then I eliminate some duplicates and finally get 24 tickets

1 2 4 8 11 16
2 5 8 9 14 16
2 7 9 12 15 16
3 5 6 10 12 16
3 5 7 10 15 16
3 9 13 14 15 16
4 5 10 12 13 16
4 6 7 10 14 16
4 6 7 12 14 16
4 8 10 11 14 16
4 9 12 14 15 16
5 6 7 11 14 16
5 6 10 13 15 16
5 7 8 11 12 16
5 8 9 12 14 16
5 8 9 13 14 16
5 8 11 12 14 16
5 9 12 14 15 16
6 7 9 10 15 16
6 7 9 11 15 16
6 7 9 13 14 16
6 7 10 11 14 16
6 8 9 11 15 16
6 9 10 14 15 16

Of course I can't compite with Covermaster