Crossroads

using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using System.Numerics;

public class Program
{
	public static void Main()
	{
		int greenLight = int.Parse(Console.ReadLine());

		int greenCopy = greenLight;
		int yellow = int.Parse(Console.ReadLine());

		Queue<string> cars = new Queue<string>();

		int passed = 0;

		while(true)
		{
			string command = Console.ReadLine();

			if(command == "END")
			{
				break;
			}

			if(command!="green")
			{
				cars.Enqueue(command);
				greenLight = greenCopy;
			}
			else if (command == "green")
			{
				while(cars.Any())
				{
					string currCar = cars.Peek();
					int currLen = currCar.Length;

					if(currLen<=greenLight)
					{
						greenLight-=currLen;
						cars.Dequeue();
						passed++;

						if(greenLight==0)
						{
							greenLight = greenCopy;
							break;
						}
					}
					else
					{
						if(currLen<=greenLight+yellow)
						{
							cars.Dequeue();
							passed++;
							break;
						}
						else
						{
							Console.WriteLine("A crash happened!");
							Console.WriteLine("{0} was hit at {1}.",currCar,currCar[greenLight+yellow]);
							return;
						}
					}
				}
			}
		}

		Console.WriteLine("Everyone is safe.");
		Console.WriteLine("{0} total cars passed the crossroads.",passed);
	}
}