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: elements 
Words: fire, earth, water, blaze, recruit

Output: recruit


Input: Consider Input: Category: mode of transportation 
Words: train, spider, wave, fly, drive

Output: spider


Input: Consider Input: Category: secretary duty 
Words: support, schedule, answer calls, hardware, file


Output: hardware