Hello - Trying to wrap my head around how to run a set of flows in parallel but the tasks within the flows in turn are run sequentially or parallel depending on the flow

@task()
def placeholder(val):
    print(F"placeholder: {val}")


@flow(task_runner=DaskTaskRunner())
def flowtestA():
    placeholder("aaa")
    for i in range(10):
        placeholder.submit(i)


@flow(task_runner=SequentialTaskRunner())
def flowtestB():
    placeholder("aaa")
    for i in range(10):
        placeholder.submit(i)

if __name__ == "__main__":
	
	flowtestA()
	flowtestB()

is there a way for flowtestA and flowtestB to run in parallel and then the tasks in flowtestA run with threading due to the DaskTaskRunner decorator but run sequentially in flowtestB?