How would I type check for a specific set of allowed strings?

[Revelted]

For typechecking, I suggest looking at this:

Finding closest answer to string

Using a string similarity algorithm is one method for locating the string in a table of strings that most closely resembles a target string. For calculating the similarity between two strings, a variety of algorithms are available, including: The Levenshtein distance algorithm determines how many insertions, deletions, or substitutions are necessary to change one string into another. The similarities between the strings increase with decreasing distance. The size of the intersection of two set…

Thats my small input haha