3.12 LAB Seasons

input_month = input()
input_day = int(input())

spring = ('March', 'April', 'May', 'June')
spring_s = ('April', 'May')
summer = ('June', 'July', 'August', 'September')
summer_s = ('July', 'August')
autumn = ('September', 'October', 'November', 'December')
autumn_s = ('October', 'November')
winter = ('December', 'January', 'February', 'March')
winter_s = ('January', 'February')
valid_months = ('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December')
month_long = ('January', 'March', 'May', 'July', 'August', 'October', 'December')
month_short = ('April', 'June', 'September', 'November')

if not (1 <= input_day <= 31) or not (input_month in valid_months):
    print('Invalid')
if (input_month in month_short) and (input_day > 30):
    print('Invalid')
elif input_month in spring:
    if (input_month in spring_s):
        print('Spring')
    if ((input_month == 'March') and (31 >= input_day > 20)) or ((input_month == 'June') and (1 <= input_day <= 20)):
        print('Spring')
    if (input_month == 'March') and (0 < input_day < 21):
        print('Winter')
    if (input_month == 'June') and (20 < input_day < 31):
        print('Summer')
elif input_month in summer:
    if input_month in summer_s:
        print('Summer')
    if ((input_month == 'June') and (20 < input_day < 31)) or ((input_month == 'September') and (21 <= input_day < 31)):
        print('Summer')
    if (input_month == 'June') and (1 <= input_day < 21):
        print('Spring')
    if (input_month == 'September') and (21 < input_day < 31):
        print('Autumn')
elif input_month in autumn:
    if input_month in autumn_s:
        print('Autumn')
    if ((input_month == 'September') and (22 <= input_day < 31)) or ((input_month == 'December') and (1 <= input_day <= 20)):
        print('Autumn')
        pass
    pass
elif input_month in winter:
    if ((input_month in winter_s) and (1 <= input_day <=31)):
        print('Winter')
    if ((input_month == 'December') and (20 < input_day < 31)) or ((input_month == 'March') and (1 <= input_day <= 19)):
        print('Winter')
    if input_month == 'December':
        print('Autumn')
    if input_month == 'March':
        print('Spring')