import java.util.Scanner;

public class No9006 {

	public static void main(String[] args) {

		Scanner sc =new Scanner(System.in);
		
		char[] s = sc.next().toCharArray();
		
		for(int i=s.length-1; i>=0; i--){
			System.out.print(s[i]);
		}
		
		
	}

}