@workflow
def mimic_sub_wf(a: int) -> (str, str):
    (x, y) = t1(a=a)
    (u, v) = t1(a=x)
    return (y, v)
@workflow
def mimic_sub_wf(a: int) -> (str, str):
    (x, y) = t1(a=a)
    (u, v) = t1(a=x)
    return (y, v)