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: type of rigidity 
Words: solid, leverage, hard, unbending, firm

SOLUTION: leverage

PROBLEM: Category: secretary duty 
Words: file, errands, type, folder, order office supplies

SOLUTION: folder

PROBLEM: Category: ocean 
Words: detests, course, moon, brine, current

SOLUTION:
detests