import java.util.Scanner;
import java.io.PrintStream;

public class Reverse {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in,"UTF8");
		String S = scanner.nextLine();
		StringBuilder sb = new StringBuilder(S);
		sb.reverse().toString();
		try{
		PrintStream out = new PrintStream(System.out, true, "UTF8");
		out.println(sb);
		scanner.close();
		}catch(Exception e){}
	}
}