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: duck, get down, fall, stoop, cow

A: cow
****
Q: group, blt, french toast, hamburger, club

A: group
****
Q: ant, bird, wave, dive, fly

A:
wave
****