mnth = int(input("Введите номер месяца: "))
season = ''
if mnth == 1 or mnth == 2 or mnth == 12:
season = 'Зимой'
elif 3 <= mnth <= 5:
season = 'Весной'
elif 6 <= mnth <= 8:
season = 'Летом'
elif 9 <= mnth <= 11:
season = 'Осенью'
if season != '':
print(season)
else:
print('Ошибка ввода номера месяца!')