n = int(input())
a = 2
b = n-2
list = []
for i in range(100):
	list.append(2**i)
c = n//2
check = False
while  a <= c+1:
	a += 1
	b += -1
	if a not in list and b not in list:
		check = True
		break
if check:
	print(a,b)
else:
	print('-1')