a = int(input())
if a == 1 or a == 2 or a == 12:
print('зима')
elif a == 11 or a == 10 or a == 9:
print('осень')
elif a == 6 or a == 7 or a == 8:
print('лето')
elif a == 3 or a == 4 or a == 5:
print('весна')
else:
print('Такого месяца не существует')
