Write a program that inputs a text file. The program should print the unique words in the file in alphabetical order. Uppercase words should take precedence over lowercase words. For example, 'Z' comes before 'a'. The input file can contain one or more sentences, or be a multiline list of words.

Two students are discussing the flow of electricity. student a says that voltage is a measure of the amount of electron flow in a circuit. student b says that power is the product of voltage and current. which of the following statements is correct? a. only student a is correct b. only student b is correct c. both of the two students are correct d. neither of the two students is correct