def qtr_to_quarter(qtr):
    """Transform a quarter into the standard form

    Args:
        qtr (str): The initial quarter

    Returns:
        str: The standardized quarter
    """

    qtr_dict = {
        1: (1, "Autumn"),
        "AUT": (1, "Autumn"),
        "Autumn": (1, "Autumn"),
        2: (2, "Winter"),
        "WIN": (2, "Winter"),
        "Winter": (2, "Winter"),
        3: (3, "Spring"),
        "SPR": (3, "Spring"),
        "Spring": (3, "Spring"),
        0: (4, "Summer"),
        "SUM": (4, "Summer"),
        "Summer": (4, "Summer"),
    }
    return qtr_dict[qtr]