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class Solution:
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    def peopleIndexes(self, favoriteCompanies: List[List[str]]) -> List[int]:
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        F = favoriteCompanies
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        ans = []
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        seen = set()
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        for i in range(len(F)):
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            for j in range(i + 1, len(F)):
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                st1 = set(F[i])
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                st2 = set(F[j])
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                if st1.intersection(st2) == st1:
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                    seen.add(i)
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                if st2.intersection(st1) == st2:
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                    seen.add(j)
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        ans = []
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        for i in range(len(F)):
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            if i in seen:
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                continue
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            ans.append(i)
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        return ans