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 Python (3.4.3) (judge verdict: Runtime Error)

flag=1

a=input()
b=input()

c=""
d=""

c[0]=b[2]
c[1]=b[1]
c[2]=b[0]

d[0]=a[2]
d[1]=a[1]
d[3]=a[0]

i=0

while i<3:
    if a[i]!=c[i]:
        flag=0
    i+=1

while j<3:
    if b[j]!=d[j]:
        flag=0
    j+=1

if flag=1:
    print("YES")
else:
    print("NO")