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: computers 
Words: ram, file, prepare, keys, format

Output: prepare


Input: Consider Input: Category: widespread 
Words: boring, common, soldier, general, average

Output: soldier


Input: Consider Input: Category: military rank 
Words: plain, sergeant, private, general, colonel


Output: plain