using System;

public class Program

{

    public static void Main()

    {

        try

        {

            try

            {

                throw new Exception("A");

            }

            catch

            {

                throw new Exception("B");

            }

            finally

            {

                throw new Exception("C");

            }

        }

        catch (Exception ex)

        {

            Console.Write(ex.Message);

        }

    }

}