7.46

x = int(input())
z = 2
if x != 2:
	for i in range(x-3):
		if x % z != 0:
			z += 1
		else:
			break
else:
	print('prostoe')
if x % z == 0 and x != 2:
	print('slozhnoe')
if x % z != 0:
	print('prostoe')