// Arup Guha
// 11/9/2025
// Solution to Kattis Problem: Digit Swap

import java.util.*;

public class digitswap {

	public static void main(String[] args) {

		// Read as number.
		Scanner stdin = new Scanner(System.in);
		int num = stdin.nextInt();
		
		// Use integer division and mod to parse out digits.
		System.out.print(num%10);
		System.out.print(num/10);
		System.out.println();
	}
}