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: store status 
Words: beside, finished for the day, running., close, gated
Example Output: beside

Example Input: Category: secretary duty 
Words: schedule, file, answer calls, correspondence, ram
Example Output: ram

Example Input: Category: ocean 
Words: jetstream, history, tide, current, sea
Example Output:
history