static public Coeff Parse(string str)
        {
            Coeff Temp = new Coeff();

            string[] arr = str.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            Temp.A = Int32.Parse(arr[0]);
            Temp.B = Int32.Parse(arr[1]);
            return(Temp);
        }
        public static void Main()
        {
            Coeff  C = new Coeff();
            string str;

            WriteLine("Enter two number with ',' like a '2,3'");
            str = ReadLine();
            C   = Coeff.Parse(str);
            WriteLine(C);
        }