TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: blow, squander, apple, fritter, divide

SOLUTION: apple

PROBLEM: fire, cool, water, ban, ice

SOLUTION: ban

PROBLEM: unruffled, cool, unflappalbe, funny, mild

SOLUTION:
mild