TASK DEFINITION: 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.
PROBLEM: Category: animal 
Words: bird, fish, fly, drive, eagle

SOLUTION: drive

PROBLEM: Category: aesthetic characteristic 
Words: fair, medium, size, light, loyal

SOLUTION: loyal

PROBLEM: Category: corporate 
Words: common, inflexible, llc, firm, sustainability

SOLUTION:
inflexible