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def compress_string(s: str) -> str:

    result = []

    i = 0

    while i < len(s):

        num = 1

        # count how many times s[i] repeats

        while i + num < len(s) and s[i] == s[i + num]:

            num += 1

       

        # append with or without count

        if num > 1:

            result.append(s[i] + str(num))

        else:

            result.append(s[i])

       

        i += num

    return "".join(result)

if __name__ == "__main__":

    s = input().strip()

    print(compress_string(s))