public void FindOcurrences_1()
        {
            var solution = new _1078_OccurrencesAfterBigram();
            var result   = solution.FindOcurrences("alice is a good girl she is a good student", "a", "good");

            AssertHelper.AssertArray(new string[] { "girl", "student" }, result);
        }
        public void FindOcurrences_2()
        {
            var solution = new _1078_OccurrencesAfterBigram();
            var result   = solution.FindOcurrences("we will we will rock you", "we", "will");

            AssertHelper.AssertArray(new string[] { "we", "rock" }, result);
        }