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.

[EX Q]: descending, remorseful, down, right, ground
[EX A]: remorseful

[EX Q]: keys, file, download, folder, type
[EX A]: type

[EX Q]: bird, ant, bus, fly, beetle
[EX A]:
bus