Ticket code reads the same both ways

Problem

A ticket code is valid when it reads the same from left to right and from right to left, ignoring the difference between capital and small letters. Print YES for a valid code and NO otherwise.

Input, output and limits

Input: One line: the code, made of letters and digits, with no spaces.
Output: YES or NO.
Constraints: 1 ≤ length of code ≤ 10^5

Examples

Example

Input

Level

Output

YES

Lowercased, it is level, the same both ways.

Hints

Try the problem first. Open one hint at a time.

Hint 1

Make the whole code lowercase first.

Hint 2

A reversed copy of a string is text[::-1].

Write your Python code, run it on the examples and submit it to hidden tests.

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