TASK DEFINITION: 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.
PROBLEM: fret, nervous, board, fingerpick, jack

SOLUTION: nervous

PROBLEM: current, history, wave, jetstream, whirlpool

SOLUTION: history

PROBLEM: ostrich, digger, sandpiper, crane, goose

SOLUTION:
digger