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 PHP (7.4.4) (judge verdict: Accepted)

<?php

fscanf(STDIN, '%s', $a);
fscanf(STDIN, '%s', $b);

$ok = true;
for ($i=0; $i < strlen($a); $i++) {
    if (substr($a, $i, 1) !== substr($b, strlen($b) - 1 -$i, 1)) {
        $ok = false;
        break;
    }
}

if ($ok) {
    echo 'YES';
} else {
    echo 'NO';
}

echo PHP_EOL;