I have written this code but i want to return. missing letters in sequence like abcdef....for now it returns in bjkmqz i want bjkmqz

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import string import itertools

def get_missing_alphabets(s): if not isinstance(s,str): return None

s = s.lower() alphabets = string.ascii_lowercase result = set(alphabets) - set(s) return "".join(list(result)) print(get_missing_alphabets("A slow yellow fox crawls under the proactive dog"))//