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: secretary duty 
Words: answer calls, file, correspondence, document, fax

Output: document


Input: Consider Input: Category: moral characteristic 
Words: honorable, balanced, fair, pale, trustworthy

Output: pale


Input: Consider Input: Category: military rank 
Words: general, sergeant, normal, soldier, commander


Output: normal