using System;
using System.Linq;
using System.Collections.Generic;
namespace _07._String_Explosion
{
    class Program
    {
        static void Main(string[] args)
        {
            string field = Console.ReadLine();
            List<char> elementsOfField = new List<char>();

            int explosionRadius = 0;

            for (int i = 0; i < field.Length; i++)
            {
                elementsOfField.Add(field[i]);
            }



            for (int j = 0; j < elementsOfField.Count; j++)
            {
                if (elementsOfField[j] == '>')
                {
                    double radius = char.GetNumericValue(elementsOfField[j + 1]);

                    for (int k = j; k < elementsOfField[(int)(radius + explosionRadius)]; k++)
                    {
                        j++;
                        explosionRadius = 0;
                        if (elementsOfField[k + 1] != '>')
                        {
                            elementsOfField.RemoveAt(k + 1);
                            if (explosionRadius > 0)
                            {
                                explosionRadius--;
                            }
                        }
                        else
                        {
                            explosionRadius++;
                        }
                    }
                }
            }
        }
    }
}