Nice one. Kicking myself for not clocking into why you had used caps lock! Nice to see a unique group like that

I can't claim originality on that one- saw symmetry as a group a few months back- can't remember who but deserves a hat tip. The caps was a necessity as well as a clue! Palindromes were meant to be a clue of sorts too- get you thinking in those terms. Thanks for commenting as always! This one was fun to do.

Very clever! It is all there if you look hard enough :)