How to make couple of different lists using c#?

Got a quite huge problem. My task is to split the input text into sentences,then to split sentences into words. Here comes the code :

using System.Collections.Generic; using System.Linq;

namespace TextAnalysis { static class SentencesParserTask { public static List> ParseSentences(string text) { var sentencesList = new List>();
var splittedText = text.Split('.', '!', '?', ';', ':', '(', ')');

        List<string>[] mas = new List<string>[splittedText.Length];
        for (int i = 0; i < splittedText.Length; i++)
        {
            mas[i] = new List<string>();
        }

        for (int j = 0; j < splittedText.Length; j++)
        {
            mas[j]= GetWordsOutOfTheSentence(splittedText);
            bool isEmpty = !(mas[j]).Any();
            if(!isEmpty)
            sentencesList.Add(mas[j]);

        }
        return sentencesList;
    }

    private static List<string> GetWordsOutOfTheSentence(string[] splittedText)
    {
        var wordList = new List<string>();
        foreach (var sentence in splittedText)
        {
            var wordsArray = sentence.Split('^', '#', '$', '-', '+', '1', '=', ' ', '\t', '\n', '\r',',');
            for (int i = 0; i < wordsArray.Length; i++)
            {
                if (wordsArray[i] != string.Empty)
                {
                    var fineWord = wordsArray[i];
                    wordList.Add(fineWord.ToLower());
                }
            }
        }

        return wordList;
    }

}

}

The main problem is on test 1) Failed : TextAnalysis.SentencesParser_Tests.CorrectlyParse_SentenceDelimiters Input text: [a.b!c?d:e;f(g)h;i] Sentence #0 is wrong Expected is with 9 elements Values differ at index [1] Extra: < "b", "c", "d"... > My code just continue adding new words in list and then add that lists in main list.What should i do?