crossroads

from collections import deque

green_time = int(input())
free_window_duration = int(input())

cars = deque()
successfully_passed = 0

while True:
    line = input()
    is_accident = False
    crossing_car, hit_index = "", None
    if line == "END":
        break
    elif line == "green":
        green_light_duration = green_time
        while green_light_duration > 0 and cars:
            crossing_car = cars.popleft()
            if green_light_duration >= len(crossing_car):
                green_light_duration -= len(crossing_car)
                successfully_passed += 1
            elif green_light_duration + free_window_duration >= len(crossing_car):
                green_light_duration = 0
                successfully_passed += 1
                break
            else:
                is_accident = True
                hit_index = -(len(crossing_car) - (green_light_duration + free_window_duration))
                break
        if is_accident:
            print("A crash happened!")
            print(f"{crossing_car} was hit at {crossing_car[hit_index]}.")
            break
    else:
        cars.append(line)
if not is_accident:
    print(f"""Everyone is safe.
{successfully_passed} total cars passed the crossroads.""")