import java.util.Scanner;

public class No9005 {
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		String ret="";
		char[] n=sc.next().toCharArray();
		for(int i=n.length-1;i>=0;i--)
		ret+=n[i];
		System.out.println(ret);
	}
}