Find Palindromic Words

You are given a string containing words separated by spaces. Your task is to find and print all the palindromic words in the order they appear in the input. A palindrome is a word that reads the same forwards and backwards. The comparison is case-sensitive, so 'Anna' is not considered a palindrome, while 'anna' is.

If there are no palindromic words, print None.

Note: The input will be taken from standard input (stdin) and the output should be printed to standard output (stdout) in a single line with the palindrome words separated by a single space.

Examples:

• Input: madam racecar apple level noon → Output: madam racecar level noon
• Input: hello world example → Output: None
• Input: wow anna civic → Output: wow anna civic

inputFormat

The input consists of a single line containing a string of words separated by spaces.

outputFormat

If there are any palindromic words, output them in the order they appear separated by a single space. If there are no palindromic words, output None.

madam racecar apple level noon

madam racecar level noon