from collections import Counter
from typing import List


class Solution:
    def uncommonFromSentences(self, s1: str, s2: str) -> List[str]:
        s = s1 + " " + s2
        s = s.split()
        print(s)
        c = Counter(s)
        return [i for i, v in c.items() if v == 1]


if __name__ == "__main__":
    func = Solution().uncommonFromSentences
    s1 = "this apple is sweet"
    s2 = "this apple is sour"
    print(func(s1, s2))
