Transform negative elements of the function result without changing its code

It is necessary to change the way the foo function is used so that all numbers it returns with a '‑' sign become positive. The foo function itself must not be modified.

def foo(length: int = 10) -> list[int]:
    is_minus = length < 0
    return [i if not is_minus else -i for i in range(abs(length)) if i % 2 == 0]

Your solution should wrap the call to foo and adjust the resulting list without changing the implementation of the function.