/**
*同数字反转一样,(换汤不换药)只需将类型变换一下
*/
import java.util.*;
public class Main{
public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()){
            String str = scan.nextLine();     //这里变为String类型
            StringBuilder stb = new StringBuilder();
            stb.append(str);                 //这里传进字符串
            stb.reverse();
            System.out.println(stb);
        }
    }
}