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.

[Q]: backward, south, down, forward, shameful
[A]: shameful


[Q]: centimeter, yard, foot, milimeter, head
[A]: head


[Q]: concise, sausage, pork, weenie, frank
[A]:
concise