Rotation

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.

Examples

Input

pot top

Output

YES

Input

tab bet

Output

NO

Input

eye eel

Output

NO

inputFormat

Input

Input is given from Standard Input in the following format:

C_{11}C_{12}C_{13} C_{21}C_{22}C_{23}

outputFormat

Output

Print YES if this grid remains the same when rotated 180 degrees; print NO otherwise.

Examples

Input

pot top

Output

YES

Input

tab bet

Output

NO

Input

eye eel

Output

NO

样例

tab
bet

NO