import java.util.Scanner;
public class Main
{   
	public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int x = sc.nextInt();
        int a = x/10;
        int b = x%10;
        System.out.println(b*10+a);
    
    }
}
/**************************************************************
	Problem: 1707
	User: admin
	Language: Java
	Result: Accepted
	Time:620 ms
	Memory:39948 kb
****************************************************************/