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: weather 
Words: stormy, make the grade, sunny, texture, fair
Example Output: texture

Example Input: Category: window material 
Words: glass, coating, panel, spatula, lead
Example Output: spatula

Example Input: Category: card games 
Words: gin, uno, go fish, tequila, spades
Example Output:
tequila