using System;

using System.Collections.Generic;

public class Program

{

    private static Dictionary<string, int> GetWordsFrequencyCount(string text)

    {

        Dictionary<string, int> result = new Dictionary<string, int>();

        foreach (string word in text.ToLower().Split(' ')) {

            if (result.ContainsKey(word)) {

                result[word]++;

            }

            else {

                result[word] = 1;

            }

        }

        return result;

    }

    private static Dictionary<int, int> GetWordsLengthFrequencyCount(string text)

    {

        Dictionary<int, int> result = new Dictionary<int, int>();

        foreach (string word in text.ToLower().Split(' ')) {

            if (result.ContainsKey(word.Length)) {

                result[word.Length]++;

            }

            else {

                result[word.Length] = 1;

            }

        }

        return result;

    }

    public static void Main()

    {

        foreach (KeyValuePair<string, int> item in GetWordsFrequencyCount("My bike and my book")) {

            Console.WriteLine(item.Key + ": " + item.Value);

        }

        foreach (KeyValuePair<int, int> item in GetWordsLengthFrequencyCount("My bike and my book")) {

            Console.WriteLine(item.Key.ToString() + ": " + item.Value.ToString());

        }

    }

}