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.
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Question: Category: secretary duty 
Words: file, organize, schedule appointments, answer calls, program

Answer: program


Question: Category: weather 
Words: honorable, fair, stormy, sunny, endure

Answer: honorable


Question: Category: animal 
Words: raft, dolphin, stingray, fish, horse

Answer:
raft