#include<bits/stdc++.h>
using namespace std;
int main(){
    int i,g,d=0;
    cin>>i;
    while(i){
    	g=i%10;
    	i=i/10;
    	d=d*10+g;
    }
    cout<<d; 
}

/**************************************************************
	Problem: 1121
	User: chenjunlin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/