Problem:
Score : 100 points

Problem Statement

You are given a grid with 2 rows and 3 columns of squares.
The color of the square at the i-th row and j-th column is represented by the character C_{ij}.

Write a program that prints YES if this grid remains the same when rotated 180 degrees, and prints NO otherwise.

Constraints

C_{i,j}(1 \leq i \leq 2, 1 \leq j \leq 3) is a lowercase English letter.

Input

Input is given from Standard Input in the following format:

C_{11}C_{12}C_{13}
C_{21}C_{22}C_{23}

Output

Print YES if this grid remains the same when rotated 180 degrees; print NO otherwise.

Sample Input 1

pot
top

Sample Output 1

YES

This grid remains the same when rotated 180 degrees.

Sample Input 2

tab
bet

Sample Output 2

NO

This grid does not remain the same when rotated 180 degrees.

Sample Input 3

eye
eel

Sample Output 3

NO

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Linq;
using System.Collections.Generic;
using System.IO;

public class Program
{

    public static void Main()
    {
        string c1 = Console.ReadLine();
        string c2 = Console.ReadLine();
        string ans = "NO";
        c2 = new string(c2.Reverse().ToArray());
        if (c1 == c2) ans = "YES";
        Console.WriteLine(ans);
    }


    static int[] s_to_i(string[] s)
    {
        int[] ret = Array.ConvertAll<string, int>(s, delegate (string value) { return int.Parse(value); });
        return ret;
    }
}