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.

Example Input: goodies, weenie, blunt, wiener, frank
Example Output: blunt

Example Input: alright, detached, fine, acceptable, bright
Example Output: bright

Example Input: flat, studio, duplex, valley, mansion
Example Output:
valley