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: crane, ostrich, davit, dump truck, pelican
Example Output: dump truck

Example Input: goodies, wienerwurst, frank, hot dog, brash
Example Output: brash

Example Input: wave, cockroach, dangle, fly, jump
Example Output:
wave