Provide a class Letter for authoring a simple letter. In the constructor, supply the names of the sender and the recipient: def _init (self, letterFrom, letterTo) Supply a method def addLine (self, line) to add a line of text to the body of the letter Supply a method def getText(self) that returns the entire text of the letter. The letter has the form: Dear recipient name: "blank line first line of the body second line of the body last line of the body "blank line" Sincerely, "blank line" sender name For example, assuming that you have the sender named John and the recipient named Mary. John wrote two lines of the letter: 1: "How are you?" 2: I really miss you! Your test file leveraging this Letter class will have the following output