#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;
const int maxn=17;
int main(){
    freopen("reverse.in","r",stdin);
    freopen("reverse.out","w",stdout);
    int n,k=1;
    cin>>n;
    int a[maxn];
    while(n>1){
        n/=10;
        k++;
    }
    for(int i=1;i<=k;i++) 
        a[i]=0;   
    for(int i=1;i<=k;i++){
        int x=pow(10,i);
        a[i]=n%x;
        n/=10;
    }
    for(int i=0;i<k;i++)
        a[i]=a[k-i];
    for(int i=0;i<k;i++)
        cout<<a[i];
    fclose(stdin);fclose(stdout);    
}