import string


def simplestring(length, offset=0):
    """
    Deterministically generates a string.
    Args:
        length: Length of the string
        offset: Offset of the string

    Returns:
        A string formed of lowercase ASCII characters.
    """
    return "".join(
        [
            string.ascii_lowercase[(i + offset) % len(string.ascii_lowercase)]
            for i in range(length)
        ]
    )