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: summer, roll, plummet, fall, exercise

SOLUTION: summer

PROBLEM: file, keys, organize, errands, correspondence

SOLUTION: keys

PROBLEM: below, shameful, unhappy, down, disgusted

SOLUTION:
below