def retrieve_next_month(current_month, year):
    current_month_index = months.index(current_month)
    try:
        next_month = months[(current_month_index + 1)]
        year = year
        return (next_month, year)
    except IndexError:
        current_month_index = 0
        next_month = months[current_month_index]
        year = (year + 1)
        return (next_month, year)
def retrieve_next_month(current_month, year):
    current_month_index = months.index(current_month)
    try:
        next_month = months[(current_month_index + 1)]
        year = year
        return (next_month, year)
    except IndexError:
        current_month_index = 0
        next_month = months[current_month_index]
        year = (year + 1)
        return (next_month, year)