public void Test_Day4PassphraseAnagramChecker_SortLetters()
        {
            Assert.AreEqual("abcde", Day4PassphraseAnagramChecker.SortLetters("abcde"));
            Assert.AreEqual("abcde", Day4PassphraseAnagramChecker.SortLetters("ecdab"));

            Assert.AreEqual("aab", Day4PassphraseAnagramChecker.SortLetters("aab"));
            Assert.AreEqual("aab", Day4PassphraseAnagramChecker.SortLetters("aba"));
            Assert.AreEqual("aab", Day4PassphraseAnagramChecker.SortLetters("baa"));
        }
 public void Test_Day4PassphraseAnagramChecker_Solve()
 {
     Assert.AreEqual(167, Day4PassphraseAnagramChecker.Solve("Day4Data.txt"));
 }