public void CreatesListOfLetters()
            {
                Anacrostic anacrostic = new Anacrostic("az");

                Assert.AreEqual(1, anacrostic.Remaining('a'));
                Assert.AreEqual(1, anacrostic.Remaining('z'));
                for (char letter = 'b'; letter < 'z'; letter++)
                {
                    Assert.AreEqual(0, anacrostic.Remaining(letter));
                }
            }
            public void Multiples()
            {
                Anacrostic anacrostic = new Anacrostic("aaz");

                Assert.AreEqual(2, anacrostic.Remaining('a'));
                Assert.AreEqual(1, anacrostic.Remaining('z'));
                for (char letter = 'b'; letter < 'z'; letter++)
                {
                    Assert.AreEqual(0, anacrostic.Remaining(letter));
                }
            }
            public void WHICH_FindsWord()
            {
                Anacrostic anacrostic = new Anacrostic("which");

                anacrostic.RemoveWord("which");
                for (char letter = 'a'; letter <= 'z'; letter++)
                {
                    Assert.AreEqual(0, anacrostic.Remaining(letter));
                }
            }