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: Accepted)

#include <cstdio>
#include <iostream>
#include <cstring>
#define maxn
#define mem(a,b) memset(a,b,sizeof(a))
using namespace std;
inline void read(int& x)
{	char c=getchar();x=0;int y=1;
	while(c<'0'||c>'9'){if(c=='-') y=-1;c=getchar();}
	while(c>='0'&&c<='9') x=x*10+c-'0',c=getchar();
	x*=y;
}
bool mk;
char T[5][18];
int main()
{   for(int i=1;i<=2;++i)
		scanf("%s",T[i]+1);
	for(int i=1;i<=3;++i)
		if(T[1][i]!=T[2][3-i+1])
		{	mk=1;break;
		}
	if(!mk) puts("YES");
	else puts("NO");
	return 0;
}