#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
import sys, codecs
sys.stdin  = codecs.getreader('utf-8')(sys.stdin)
sys.stdout = codecs.getwriter('utf-8')(sys.stdout)

s = raw_input()
res = '(ΦωΦ)＜これは無駄な文字列です'
for x in reversed(s):
    res += x
print res.lstrip('(ΦωΦ)＜これは無駄な文字列です')