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: support, fax, file, download, errands

SOLUTION: download

PROBLEM: Category: bird 
Words: winch, swallow, winch, crane, parrot

SOLUTION: winch

PROBLEM: Category: animal 
Words: bus, leap, spider, run, fly

SOLUTION:
bus