Here are 12 numbers: 11,18,20,21,22,24,25,28,29,32,33,35
Or, try even smaller group: 11,22,25,28,29,33
Smaller groups have more flaws to them, and only sometimes they can deliver well on a promise, may be once a month or few months. But guess what, you might as well skip that one game. Participation matters, just like in life. If one participates, he might achieve or not, but if he or she does not participate, there is no achievement or win for sure.
Those two groups are result of several methods combined.
By previous method group would be 22 numbers:
11,18,20,21,22,24,25,28,29,32,33,35, 10, 17, 26, 31, 34, 12, 14, 15, 23, 30.
Large group disadvantage is more tickets needed, and loss can be attributed to the player's personal choices of number combinations. Most of us can not afford to buy lots of tickets, so simplest way to try and match something is to make sure all the numbers in a group are used in your tickets.
Good luck.