#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n; 

    int reversed = 0;
    reversed += (n % 10) * 1000;  
    n /= 10;
    reversed += (n % 10) * 100;  
    n /= 10;
    reversed += (n % 10) * 10;   
    n /= 10;
    reversed += n;               

    cout << reversed;  
    return 0;
}