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: sugar, angular momentum, large, area, fat
Example Output: sugar

Example Input: money, fine, prime, ticket, dull
Example Output:
dull