class Program
    {
        static void Main(string[] args)
        {
            ReadFile().Wait();

            Console.ReadLine();
        }

        static async Task ReadFile()
        {
            using (StreamReader sr = new StreamReader("upload.sql"))
            {
                string line;
                while ((line = await sr.ReadLineAsync()) != null)
                {
                    int index = -1;
                    if(!string.IsNullOrEmpty(line) && (index = line.IndexOf("q2_")) != -1)
                    {
                        var splited = line.Substring(index, line.IndexOf(' ', index) - index);
                        Console.WriteLine(splited);
                    }
                }
            }
        }
    }