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-----
pot
top

-----Sample Output-----
YES

This grid remains the same when rotated 180 degrees.

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