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# Runtime: 92 ms (Top 5.11%) | Memory: 14.1 MB (Top 58.38%)
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class Solution:
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    def reverseStr(self, s: str, k: int) -> str:
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        a = list(s)
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        for i in range(0, len(a), 2 * k):
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            a[i : i + k] = a[i : i + k][::-1]
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        print(a)
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        return "".join(a)