using System;
using System.Collections.Generic;
using System.Text;

namespace CSharpUnitTesting
{
    public class WordList
    {
        // Attributes
        private List<string> _words;

        // Constructors
        public WordList()
        {
            _words = new List<string>();
        }

        // Properties

        // Methods
        public void AddWord(string word)
        {
            _words.Add(word);
        }

        public string GetWord(int index)
        {
            if (index < _words.Count)
            {
                return _words[index];
            }
            return "";
        }

        public bool ContainsWord(string word)
        {
            return _words.Contains(word);
        }

        public bool RemoveWord(string word)
        {
            return _words.Remove(word);
        }

        public bool RemoveWordAt(int index)
        {
            if (index < _words.Count)
            {
                _words.RemoveAt(index);
                return true;
            }
            return false;
        }

        public int GetWordIndex(string word)
        {
            for (int index = 0; index < _words.Count; index++)
            {
                if (_words[index] == word)
                    return index;
            }
            return -1;
        }

        public bool GetLastWord(out string word)
        {
            if (_words.Count > 0)
            {
                word = _words[_words.Count-1];
                return true;
            }
            word = "";
            return false;
        }
    }
}