You are given a three-digit positive integer N.
Determine whether N is a palindromic number.
Here, a palindromic number is an integer that reads the same backward as forward in decimal notation.

Constraints

• 100≤N≤999
• N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a palindromic number, print Yes; otherwise, print No.

Examples

Input

575

Output

Yes

Input

123

Output

No

Input

812

Output

No

见题面

见题面