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: fire, hire, heat, inferno, earth

SOLUTION: hire

PROBLEM: deck, board, cards, knockout, draw

SOLUTION: knockout

PROBLEM: wrestle, fish, iguana, hiking, hunt

SOLUTION:
iguana