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: deck, suits, lifeline, draw, fold

SOLUTION: lifeline

PROBLEM: streamline, sustainability, private, firm, stiff

SOLUTION: stiff

PROBLEM: apartment, cabin, squashed, smooth, flat

SOLUTION:
smooth