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: fritter, fried, cake, patty, seperate
Example Output: seperate

Example Input: hiking, stingray, shark, fish, tiger
Example Output: hiking

Example Input: crane, dump truck, ostrich, heron, tackle
Example Output:
dump truck