Problem
Given a sentence S (words separated by spaces), print the longest word that is a palindrome. If there are multiple, print the first. If none, print "None".
Input format
Input
input.txt
- String S (up to 100 chars, lowercase, may contain spaces)
Output format
Output
output.txt
- The longest palindromic word or "None"
Example
input
wow level noon test
output
level
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Sample cases (from the problem)
Sample Case 1
Input
wow level noon test
Expected output
level
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