#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import hashlib


def solve(s):
    m1 = hashlib.md5()
    m1.update(s.encode())
    m2 = hashlib.md5()
    m2.update(m1.hexdigest().encode())
    return m2.hexdigest()


def main():
    print(solve(input()))


if __name__ == '__main__':
    main()