I get the principle itself, but I cannot figure out how to form the 'boxes' and the 'objects' for these problems so that I can try to answer them: 1. Thirty buses are to be used to transport 2000 refugees from Gander to St. John's, Newfoundland. Each bus has 80 seats. Assume one seat per passenger. Prove that one of the buses will carry at least 67 passengers. 2. George has promised to increase his vocabulary by learning the meanings of 90 new words during his summer holidays. Suppose he has 53 days in which to accomplish this task and will learn at least one new word a day. Show that during some span of consecutive days, George will learn precisely 15 new words. Pointing me in the right direction with either of these will be greatly appreciated.