HHC 2021 Programming Contests - Surprise !

[Didier Lachieze]

I've updated my initial post with the 35-byte version of my program, including step-by-step comments, as well as some details on the Q-register and how it works from Wickes' Synthetic Programming book, and also why I'm using PASN instead of GTO IND M to create the reversed string in the Q register.