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: pay, praise, fire, inferno, let go
Example Output: inferno

Example Input: crew, joker, deck, chips, pack
Example Output: crew

Example Input: concerted, stiff, streamline, firm, amalgamated
Example Output:
stiff