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: mode of transportation 
Words: train, spider, wave, fly, drive
Example Output: spider

Example Input: Category: ocean 
Words: up to the moment, tide, current, jetstream, brine
Example Output: up to the moment

Example Input: Category: fried food 
Words: danish, fritter, croquet, fried, lollygag
Example Output:
lollygag