Sha-1: 85b5aa2e1042b3f2a0e303bd3f25d4c34786138e Allowed strings: Anything with uppercase or lowercase letters (A-Z, a-z) Projected difficulty: Not that hard
My rule has an opinion on Noldor politics, so Yes: Feanor No: Fingolfin
I am number 63. I'm also ESL, please don't eat me.
If you have Python 3 and can express the rule in it (where input("Is " + guess + " valid (y/N)? ").lower().startswith("y") is a reasonable option), you can use my infobox generator which I’ll post tonight.
So far all the Nos are six characters or more and all start with F. Let’s see if that continues. Even if it does it won’t prove anything, because both of those, even combined, are in the Yes list, but if not it might help.