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: pie, fried, misuse, fritter, cake
Example Output: misuse

Example Input: angular momentum, fat, calcium, brittleness, ugly
Example Output: calcium

Example Input: fix, mangle, fib, rich, fudge
Example Output:
rich