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

Input: Consider Input: Category: elements 
Words: ground, replace, combustion, flame, fire

Output: replace


Input: Consider Input: Category: emotional display 
Words: pester, fawn, suppressed, follow, woods

Output: woods


Input: Consider Input: Category: type of sandwich 
Words: hamburger, club, discothek, lettuce, dagwood


Output: discothek