Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Input: Consider Input: unflappalbe, refreshing, funny, cool, confident

Output: refreshing


Input: Consider Input: motherboard, schedule appointments, schedule, file, type

Output: motherboard


Input: Consider Input: content, shop, thing, happy, program


Output: happy