#include<bits/stdc++.h>
using namespace std;
int main()
{
    char arr[]={"123.4"};
    cin>>arr;
    char change=0;
    int length=strlen(arr);
    int j=length-1;
    for(int i=0;i<length/2;i++){
        change=arr[i];
        arr[i]=arr[j];
        arr[j]=change;
        j=j-1;
    }
    cout<<arr;
    return 0;
}