instruction:
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.
question:
bus, fly, swim, spider, flap
answer:
spider


question:
invent, smuggled, smear, fudge, pie
answer:
pie


question:
flat, horizontal, mansion, hill, mountain
answer:

mansion