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++14 (GCC 5.4.1) (judge verdict: Runtime Error)

#include <iostream>
#include <string>
#include <vector>
typedef unsigned int UINT;
using namespace std;

bool issimilar(vector<vector<char>> &mas) {
    if (mas[0][0] != mas[1][2])
        return false;
    if (mas[0][1] != mas[1][1])
        return false;
    if (mas[0][2] != mas[1][0])
        return false;
    return true;
}


int main(void) {
    vector<vector<char>> mas;
    for (auto a: mas) {
        for (char & x : a)
            cin >> x;
    }
    if (issimilar(mas))
        cout << "YES\n";
    else
        cout << "NO\n";
       
    return 0;
}