using System;

public class Program

{

    public static void Main()

    {

        if(a() || b() && c() )

            Console.WriteLine("true");

        else

            Console.WriteLine("false");

    }

    static bool a() { Console.WriteLine("a"); return true; }

    static bool b() { Console.WriteLine("b"); return false; }

    static bool c() { Console.WriteLine("c"); return false; }

}