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;

class Atcoder65
{
    public static void Main()
    {
        string top = Console.ReadLine();
        string bot = Console.ReadLine();

        char top0 = top[0];
        char top1 = top[1];
        char top2 = top[2];

        char bot0 = bot[0];
        char bot1 = bot[1];
        char bot2 = bot[2];

        if (top0 == bot2 && top1 == bot1 && top2 == bot0)
            Console.WriteLine("YES");
        else
            Console.WriteLine("NO");
    }
}