import java.util.*;
public class Main{
public static void main(String[] args){
Scanner in = new Scanner(System.in);
String str = in.nextLine();
long num = Long.parseLong(str);
int[] nums = new int[str.length()];
for(int i=str.length()-1;i>=0;i--){
nums[i]=(int)num%10;
num/=10;
} StringBuffer sb = new StringBuffer(""); for(int e :nums ){ sb.append(e); } System.out.println(sb.reverse()); }
}