class Lower:
    def __init__(self, s):
        self.s = s
        self.l = len(self.s)

    def __iter__(self):
        self.c = 0
        return self

    def __next__(self):
        res = ""
        if self.c < self.l:
            if self.s[self.c].isupper():
                res = chr(ord(self.s[self.c])+32)
            else:
                res = self.s[self.c]
            self.c += 1
            return res
        else:
            raise StopIteration

for i in Lower("HeLlo"):
    print(i, end="")

# Coded by Saahil