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.

Input: Consider Input: Category: consumer product 
Words: shop, tools, happy, service, content

Output: happy


Input: Consider Input: Category: moral characteristic 
Words: mild, equitable, unprejudiced, trustworthy, fair

Output: mild


Input: Consider Input: Category: secretary duty 
Words: reception, make coffee, program, errands, file


Output: program