Expletives are words that have no content. For instance, "it" and "there" are often used as expletives in sentences such as "It is dark" and "There are three solutions to this puzzle." In these sentences, "it" and "there" have no content; they are simply linguistic placeholders. Expletives are sometimes necessary, e.g., "It is raining." Often, however, they add unnecessary words to a sentence: "There are three solutions to this puzzle" can easily be shortened to "This puzzle has three solutions." To find all the expletives counted by this program, type the following command after this program is finished. style -e filename