//HONY SHEENE LACDO-O

//Realyn RACINES

​

    using System;

    public class Program

{

    public static void Main()

    {

        string Sentence;

        Console.WriteLine("Enter a string: ");

        Sentence=Console.ReadLine();

        Sentence=Sentence.ToLower();

        Sentence=Sentence.Replace(" ","");

        Sentence=Sentence.Trim();

        int others;

        for(int sen=0; sen<Sentence.Length;sen--)

        {

            Console.WriteLine(Sentence);

            string sub=Sentence.Substring(0,1);

            others=Sentence.IndexOf(sub);

            int counter=0;

            while(others != -1)

            {

                counter++;

                others=Sentence.IndexOf(sub,others +1);

            }

            Console.WriteLine("{0} - {1}",sub,counter);

            Sentence=Sentence.Replace(sub,"");

        }

    }

}