TASK DEFINITION: Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
PROBLEM: Category: secretary duty 
Words: support, hardware, prepare, file, make coffee

SOLUTION: hardware

PROBLEM: Category: ocean 
Words: current, early, water, brine, tide

SOLUTION: early

PROBLEM: Category: type of rigidity 
Words: unyielding, taut, resistant, concerted, firm

SOLUTION:
concerted