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

namespace TextAnalysis
{
    static class TextGeneratorTask
    {
        public static string ContinuePhrase(Dictionary<string, string> nextWords, string beginParse, int wordsCount)
        {
            var words = beginParse.Split().ToList();
            for (var i = 0; i < wordsCount; i++)
            {
                if (words.Count > 1 && nextWords.ContainsKey(words[words.Count - 2] + " " + words[words.Count - 1]))
                    words.Add(nextWords[words[words.Count - 2] + " " + words[words.Count - 1]]);
                else if (nextWords.ContainsKey(words[words.Count - 1]))
                    words.Add(nextWords[words[words.Count - 1]]);
                else break;
            }
            return string.Join(" ", words);
        }
    }
}