class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            List<char> typingList = new List<char>();
            for (int i = 0; i < n; i++)
            {
                string[] inputStr = Console.ReadLine().Split(' ');
                if (int.Parse(inputStr[0]) == 0)
                {
                    typingList.Add(char.Parse(inputStr[1]));
                }
                else
                {
                    typingList.Insert(0,char.Parse(inputStr[1]));
                }
            }
            foreach(var c in typingList)
            {
                Console.Write(c);
            }
            Console.WriteLine();
        }

    }