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.

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

Ex Output:
motherboard


Ex Input:
big boned, vitamin c, fiber, sugar, fat

Ex Output:
big boned


Ex Input:
timely, current, data sets, do tests, course

Ex Output:

course