Train Lists

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

namespace Lists
{
    class Program
    {
        static void Main(string[] args)
        {

            List<int> numbers = Console.ReadLine().Split().Select(int.Parse).ToList();
            int capacity = int.Parse(Console.ReadLine());
            string command =Console.ReadLine();
            while(command!="end")
            {
                string[] tokens = command.Split();
                switch(tokens[0])
                {
                    case "Add":
                        int number = int.Parse(tokens[1]);
                        numbers.Add(number);
                        break;
                    default:
                        number = int.Parse(tokens[0]);
                        FindWagon(numbers, number, capacity);
                        break;
                }
                command = Console.ReadLine();
            }
            Console.WriteLine(String.Join(" ", numbers));
        }

        private static void FindWagon(List<int> numbers, int number, int capacity)
        {
            for (int i = 0; i < numbers.Count; i++)
            {
                if(numbers[i]+number<=capacity)
                {
                    numbers[i] = numbers[i] + number;
                    break;
                }
            }
        }
    }
}