int count = int.Parse(Console.ReadLine());
            string someString = Console.ReadLine();
            //if(char.IsUpper(someString[1]))
            //    Console.WriteLine(someString[1]);
            for(int i = 0; i < count; i++)
            {
                if(char.IsLetter(someString[i]))
                    Console.Write(someString[i]);
            }