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#include <bits/stdc++.h>

#include <iostream>

using namespace std;

int main(){

//program to reverse a string.

string s;

cin>>s;

int b = 0;

int e = s.length() - 1;

while(b<e){

char tmp = s[b];

s[b] = s[e];

s[e] = tmp;

b++;

e--;

}

cout<<s;

return 0;

}