Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Example Input: concerned, strap lock, anxious, bored, fret
Example Output: strap lock

Example Input: hotel, level, flat, even, lined
Example Output: lined

Example Input: fine, wispy, alright, mad, well
Example Output:
wispy