#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,d=0,n;
    cin>>n;
    while(n!=0){
        a=n%10;
        n=n/10;
        d=d*10+a;
    } cout<<d;
    return 0;   
}
/**************************************************************
	Problem: 1121
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/