Click on every series of four or more letters that is strictly progressive or degressive alphabetically speaking.
Example: Click on APU (A→P→U) but not on RBS (R←B→S).
Massive thanks, it helps a lot! I checked everything for like one hour but I was too much into it, I missed some. Hopefully no more are missing or extandable now.
Gad you liked the idea!
Also, for some reason one of the answers is inverted and starts with Z
I really hope it was the last one...