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:
data sets, water, timely, current, late

Ex Output:
water


Ex Input:
motherboard, folder, hardware, file, schedule appointments

Ex Output:
schedule appointments


Ex Input:
excavator, parrot, swift, flamingo, crane

Ex Output:

excavator