Palindromic String Checker

You are given a string S. Your task is to determine whether S is a palindrome. A palindrome is a string that reads the same backward as forward. In this problem, you should ignore spaces and treat uppercase and lowercase letters as equivalent.

For example, the string "A man a plan a canal Panama" should be considered a palindrome.

If after removing all spaces and converting to lowercase the string reads the same backward as forward, output YES; otherwise, output NO.

Note: All input should be read from standard input and all output should be written to standard output.

inputFormat

The input consists of a single line containing the string S. The string may contain letters, digits, spaces, and punctuation.

Read the input from stdin.

outputFormat

Output a single line containing either YES if S is a palindrome after removing spaces and converting to lowercase, or NO otherwise.

Write your answer to stdout.

radar

YES