season = int(input("Введите номер месяца: "))
if season =< 3 :
print("Зима!")
elif season => 3 and season =< 6 :
print("Весна!")
elif season => 6 and season =< 9 :
print("Лето!")
elif season => 9 and season =< 12 :
print("Осень!")
else:
print("Вы ввели неверный номер")