using System;

public class Program

{

    public static void Main()

    {

        double x1 = 0.1;

        double x2 = 0.1;

        double x3 = 0.1;

        double x4 = 0.1;

        double x5 = 0.1;

        double x6 = 0.1;

        double x7 = 0.1;

        double x8 = 0.1;

        double x9 = 0.1;

        double x10 = 0.1;

        double y = 1.0;

        if (x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9 + x10 - y < 0.000001){

            Console.WriteLine("a");

        } else {

            Console.WriteLine("b"); 

        }

​

    }

}