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: order office supplies, sort mail, file, program, type

Output: program


Input: Consider Input: Category: bird 
Words: crane, concrete pourer, goose, hoist, duck

Output: concrete pourer


Input: Consider Input: Category: animals 
Words: swan, ostrich, duck, bow, cow


Output: bow