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: current, history, wave, jetstream, whirlpool

A: history
****
Q: deck, board, cards, knockout, draw

A: knockout
****
Q: bee, fly, jump, glide, grasshopper

A:
glide
****