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: ghostly, fair, medium, cold, well

SOLUTION: cold

PROBLEM: grasshopper, fly, walk, bus, eagle

SOLUTION: bus

PROBLEM: impartial, 70, warm, fair, luke

SOLUTION:
impartial