Each individual number is strictly random selection. The grouping is rather managed than random, since the historical results are obviously symmetrical. There is symmetry in big/small and even/odd and inner/outer, ... numbers. The symmetry exists in 9 (perhaps more) different categories. The Lottery Generator resolves this conflict between random individual picks and balanced grouping them into combinations.
Once you are ready, you can use the combinations, or email them to your friends.