a_train = ["D418X", "G042K", "Z944X", "N424L", "T861N", "N755H"]
b_train = ["Z606L", "F320R", "M498D", "Z760K", "A887M", "P156V", "I057G"]

# Identify the first car
my_train = a_train
first_car_name = ...  # TODO
print(f"First car in {my_train} is: {first_car_name}")

# Identify the last car
my_train = a_train
last_car_name = ...  # TODO
print(f"Last car in {my_train} is: {last_car_name}")

# Check if a specific car is old
new_name = "D418X"
old_name = "Z606L"

my_name = new_name
is_old = ...  # TODO!
if is_old:
    print(f"Beware! {my_name} is an old car.")
else:
    print(f"OK: {my_name} is not old.")


# Safety Inspection
my_train = a_train
first_car_name = ...
last_car_name = ...
first_is_old = ...
last_is_old = ...
if ...:
    print("Danger! This train is not up to safety standards.")
else:
    print("Enjoy your ride.")