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: bird 
Words: flamingo, crane, upraise, winch, goose
Example Output: upraise

Example Input: Category: moral characteristic 
Words: frank, stern, bun, concise, precise
Example Output: bun

Example Input: Category: military rank 
Words: universal, general, cadet, sergeant, colonel
Example Output:
universal