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: tide, belated, signal, current, jetstream

SOLUTION: belated

PROBLEM: firm, tough, solid, hard, streamline

SOLUTION: streamline

PROBLEM: keys, answer, file, folder, motherboard

SOLUTION:
answer