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: centimeter, yard, foot, milimeter, head

SOLUTION: head

PROBLEM: fritter, dunker, patty, waste, danish

SOLUTION: waste

PROBLEM: loyalty, courage, brash, grub, frank

SOLUTION:
grub