#include <iostream>
using namespace std;


int main()
{
    int number;
    cout << "Enter your number: ";
    cin >> number;

    int num = number;
    int sum1 = 0;
    int sum2 = 0;
    int sum3 = 0;

        while (num > 0)
        {
            sum1 = sum1 * 10 + num % 10;
            num /= 10;
        }

    int remainder_of_the_number = sum1 % 1000;
    int part_of_the_number = (sum1 - remainder_of_the_number) / 1000;

    while (remainder_of_the_number > 0)
    {
        sum2 = sum2 * 10 + remainder_of_the_number % 10;
        remainder_of_the_number /= 10;
    }

    while (part_of_the_number > 0)
    {
        sum3 = sum3 * 10 + part_of_the_number % 10;
        part_of_the_number /= 10;
    }


    cout << sum3  << sum2 << endl;

    return 0;
}