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: Wrong Answer)

#include<bits/stdc++.h>
using namespace std ;
const long long inf = (long long) 2e12 ;
const long long mx = (long long) 3e6 ;

long long cal( long long x ) {
    long long s = 0 ;
    while( x ) {
        s += ( x % 10 ) ;
        x /= 10LL ;
    }
    return s ;
}

int main() {
    long long k , mn = inf , cnt = 0 ;
    scanf("%lld" , &k ) ;
    for( long long i = 1LL ; i*k <= inf && cnt <= mx ; i++ ) {
        mn = min( mn , cal(i*k) ) ;
        ++cnt ;
    }
    printf("%lld\n" , mn ) ;
//    cerr << clock() << " ms" << endl ;
    return 0 ;
}