using System;

public class Program

{

    public static void Main()

    {

        var sql = "select * from system_user where ";

        var poco = sql.ToUpper().Trim();

        poco = sql.Substring(sql.IndexOf("from")+4).Trim();

        if (poco.Contains(' ')){

            poco = poco.Substring(0,poco.IndexOf(' '));

        }

        Console.WriteLine(poco);

    }

}