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: animal 
Words: train, fly, jump, leap, grasshopper

Output: train


Input: Consider Input: Category: secretary duty 
Words: file, organize, schedule appointments, answer calls, program

Output: program


Input: Consider Input: Category: mode of transportation 
Words: train, bike, fish, fly, jog


Output: fish