def verify_education(education_str: str) -> bool:
    """
    A helper function to make verifying education strings easier

    Parameters
    ----------
    education_str: str
        The single letter education string to be verified.
        Valid inputs are: 'b', 'm', 'd'

    Returns
    ----------
    bool: Returns true if the education string is a valid education
    """
    return bool(
        education_str.lower() == "b"
        or education_str.lower() == "m"
        or education_str.lower() == "d"
    )