I really can not wrap my brain around them.

Got tuned in with my ev-od / hi-lo code when I was doing them.

Loaded up some combined draws with the ev-od / hi-lo code and came up with one of  these for a possible

5702, 5704, 5720, 5724, 5740, 5742, 5902, 5904, 5920, 5924, 5940, 5942, 7502, 7504, 7520, 7524, 7540, 7542, 7902, 7904, 7920, 7924, 7940, 7942, 9502, 9504, 9520, 9524, 9540, 9542, 9702, 9704, 9720, 9724, 9740, 9742
5502, 5504, 5520, 5524, 5540, 5542, 5700, 5722, 5744, 5900, 5922, 5944, 7500, 7522, 7544, 7702, 7704, 7720, 7724, 7740, 7742, 7900, 7922, 7944, 9500, 9522, 9544, 9700, 9722, 9744, 9902, 9904, 9920, 9924, 9940, 9942

5500, 5522, 5544, 7700, 7722, 7744, 9900, 9922, 9944

5760, 5762, 5764, 5780, 5782, 5784, 5960, 5962, 5964, 5980, 5982, 5984, 7560, 7562, 7564, 7580, 7582, 7584, 7960, 7962, 7964, 7980, 7982, 7984, 9560, 9562, 9564, 9580, 9582, 9584, 9760, 9762, 9764, 9780, 9782, 9784
5560, 5562, 5564, 5580, 5582, 5584, 7760, 7762, 7764, 7780, 7782, 7784, 9960, 9962, 9964, 9980, 9982, 9984