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: closest, finished for the day, bordering, nearest, close

SOLUTION: finished for the day

PROBLEM: fearful, content, substance, program, thing

SOLUTION: fearful

PROBLEM: fish, iguana, raft, shark, cow

SOLUTION:
raft