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

SOLUTION: folder

PROBLEM: Category: shady activities 
Words: falsification, wrongful, rich, fudge, unlicensed

SOLUTION: rich

PROBLEM: Category: window material 
Words: fork, glass, frame, acrylic, lead

SOLUTION:
fork