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;

namespace ABC_077_A_Csharp_ver
{
    class Program
    {
        static void Main(string[] args)
        {
            var word1 = Console.ReadLine();
            var word2 = Console.ReadLine();
            char C11 = (word1[0]); char C21 = (word2[0]);
            char C12 = (word1[1]); char C22 = (word2[1]);
            char C13 = (word1[2]); char C23 = (word2[2]);
            if (C11 == C23 && C12 == C22 && C13 == C21)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
            Console.ReadKey();
        }
    }
}