import math

def input_split_line():
    return list(map(int, input().split()))

def solve():
    # a, b = input_split_line()
    s = input()
    ans = ""
    for i in range(len(s)):
        if(s[i].isalpha()):
            ans = s[i].lower()+ans
        elif(s[i].isdigit()):
            ans = ans+s[i]
    return ans

print(solve())