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: shady activities 
Words: banned, replace, smear, chocolate cake, fudge

SOLUTION: chocolate cake

PROBLEM: Category: poker 
Words: board, joker, deck, fold, apron

SOLUTION: apron

PROBLEM: Category: secretary duty 
Words: file, schedule appointments, document, order office supplies, prepare

SOLUTION:
document