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.

Example Input: Category: physical property 
Words: sugars, fat, thin, large, angular momentum
Example Output: sugars

Example Input: Category: construction 
Words: hoist, crane, excavator, egret, derrick
Example Output: egret

Example Input: Category: date status 
Words: up to the moment, current, signal, history, do tests
Example Output:
signal