<s>[INST] class Solution:
    def findRepeatedDnaSequences(self, s: str) -> List[str]:
        seen, ans = set(), set()
        for i in range(len(s) - 9):
            sub = s[i:i+10]
            if sub in seen:
                ans.add(sub)
            seen.add(sub)
        return list(ans)[/INST]