import java.util.Scanner;

class Main{
	public static void main(String[] a){
		Scanner scanner = new Scanner(System.in);
		String input = scanner.nextLine();
        scanner.close();
		if (input.length() > 20) return;
		String reverse="";
		
		char[] c = input.toCharArray();
		for (int i = c.length; i > 0; i--) {
			reverse += c[i-1];
		}
		System.out.println(reverse);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz