time: float = 0.0

# Initial assignments
f = 2
e = f + 1
d = e + 1
c = d + 1
b = c + 1
a = b + 1
y0 = []
variable_names = []


def model(time: float, variables: tuple[float, ...]) -> tuple[float, ...]:
    return


def derived(time: float, variables: tuple[float, ...]) -> dict[str, float]:
    b: float = c + 1
    d: float = e + 1
    f: float = 2
    return {
        "b": b,
        "d": d,
        "f": f,
    }
