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# approach -1
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class Solution:
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    def toLowerCase(self, s: str) -> str:
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        ch = ""
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        for i in s:
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            asc = ord(i)
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            if asc > 64 and asc < 91:
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                ch += chr(asc + 32)
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            else:
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                ch += chr(asc)
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        return ch
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# approach -2
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class Solution:
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    return s.lower()