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: fly, flutter, bus, drive, fish

SOLUTION: fish

PROBLEM: cool, relaxed, mild, unflappalbe, assured

SOLUTION: mild

PROBLEM: metal, spoon, woodwork, glass, wood

SOLUTION:
spoon