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]: flap, glide, fly, train, bats
[A]: bats


[Q]: current, dastards, prompt, course, timely
[A]: course


[Q]: answer calls, schedule appointments, errands, file, space
[A]:
space