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: melancholy, descending, emotionalities, emotional, down

SOLUTION: descending

PROBLEM: emotionalities, opposite of up, down, miserable, ashamed

SOLUTION: opposite of up

PROBLEM: joker, deck, head, call, check

SOLUTION:
head