List-Ex/More/Messaging

using System;
using System.Linq;
using System.Collections.Generic;

namespace fundamental14
{
    class MainClass
    {
        public static void Main()
        {
            List<string> numbers = Console.ReadLine().Split().ToList();

            string text = Console.ReadLine();

            List<char> duma = new List<char>();

            List<string> final = new List<string>();

            List<int> index = new List<int>();

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

            int sum = 0;

            for (int i = 0; i < numbers.Count; i++)
            {
                string amount = numbers[i];

                for (int z = 0; z < amount.Length; z++)
                {
                    int chislo = int.Parse(amount[z].ToString());

                    sum += chislo;
                }

                if (duma.Count < sum)
                {
                    sum = sum - duma.Count;
                }

                index.Add(sum);

                sum = 0;
            }

            for (int j = 0; j < index.Count; j++)
            {
                int removeIndex = index[j];

                final.Add(duma[removeIndex].ToString());
                duma.RemoveAt(removeIndex);
            }

            for (int k = 0; k < final.Count; k++)
            {
                Console.Write(final[k]);
            }
        }
    }
}