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: ecstatic, specialty, substance, content, merchandise
Example Output: ecstatic

Example Input: basic, general, common, plain, admiral
Example Output: admiral

Example Input: invent, brownie, fudge, falsehood, fix
Example Output:
brownie