using System;
using System.Text;

namespace text
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            string text = Console.ReadLine();
            int explosionPower = 0;
            bool haveMarks = true;
            int startIndex = 0;

            for (int i = 0; i < text.Length; i++)
            {
                if (text[i] == '>')
                {
                    explosionPower += int.Parse(text[i + 1].ToString());
                    startIndex = i + 1;
                    int endIndex = text.IndexOf('>', i + 2);
                    if (endIndex == -1)
                    {
                        haveMarks = false;
                        break;
                    }

                    int lengthBetwenTwoChars = endIndex - startIndex;
                    if (explosionPower >= lengthBetwenTwoChars)
                    {
                        text = text.Remove(startIndex,lengthBetwenTwoChars);
                        explosionPower -= lengthBetwenTwoChars;
                    }

                    else if (explosionPower < lengthBetwenTwoChars)
                    {
                        text = text.Remove(startIndex, explosionPower);
                        explosionPower = 0;
                    }
                }
            }

            if (haveMarks == false)
            {
                int lastSubstringLength = text.Length - startIndex;

               
                if (explosionPower >= lastSubstringLength)
                {
                    text = text.Remove(startIndex,lastSubstringLength);
                }

                else if (explosionPower < lastSubstringLength)
                {
                    text = text.Remove(startIndex, explosionPower);
                }
            }

            Console.WriteLine(text);

        }
    }
}