def test_left_most_reserved_case():
actual = plane_seat_reservations("5A", 10)
assert actual == 29
def test_empty_case():
actual = plane_seat_reservations("", 1)
assert actual == 3
def test_all_middle_reserved_case():
actual = plane_seat_reservations("1D 1E 1F 1G", 3)
assert actual == 8
def test_middle_left_mid_reserved_case():
actual = plane_seat_reservations("1E", 7)
assert actual == 20
def test_middle_left_and_right_most_reserved_case():
actual = plane_seat_reservations("1D 1G", 4)
assert actual == 11
def test_middle_left_most_reserved_case():
actual = plane_seat_reservations("3D", 3)
assert actual == 9