from typing import List


def list_compare(a: List[str], b: List[str]):
    """Compare a list of strings and return a list of strings 
    that are do  not match."""
    set_a = set(a)  
    set_b = set(b)  
    no_match_terms = set_a.union(set_b)  - set_a.intersection(set_b)
    return no_match_terms