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: aesthetic characteristic 
Words: high quality, ok, level, classy, fine

SOLUTION: ok

PROBLEM: Category: body part 
Words: inch, head, foot, ear, finger

SOLUTION: inch

PROBLEM: Category: aesthetic characteristic 
Words: pretty, probation, neat, fine, level

SOLUTION:
probation