using System;

public class Program

{

    public static void Main()

    {

        int a = 4, b = 3;

do {

for( int i=10; i>=0; i-=3){

a *= 2;

b++;

}

} while (a <=8);

        Console.WriteLine("a=" +a);

        Console.WriteLine("b=" +b);

    }

}