using System;

public class Program

{

    public static void Main()

    {

        string str = "Hello World";

        string output = string.Empty;

        for(int i = 0; i < str.Length; i++)

        {

            if(!output.Contains(str[i].ToString()))

            {

            int count = 0;

            for(int j = 0; j < str.Length; j++)

        {

            if(str[i] == str[j])

            {

                count++;

            }

        }

            output += str[i];

            Console.WriteLine(str[i] + " count is " + count);

            }

        }

    }

}