Problem
Given a sentence S, print the longest word with all unique letters (no repeats). If multiple, print the first. If none, print "None".
Input format
Input
input.txt
- String S (up to 100 chars, lowercase)
Output format
Output
output.txt
- The longest word with all unique letters or "None"
Example
input
apple code night
output
night
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Sample cases (from the problem)
Sample Case 1
Input
apple code night
Expected output
night
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