import math
N = int(input())
two_pow = [1]
bit = 1
while bit < N:
	bit <<= 1
	two_pow.append(bit)

if N % 2 == 1:
	n = N - 3
	while (n in two_pow) and n > 0:
		n -= 2

	if n == 0:
		print(-1)
	else:
		print(str(min(N-n,n)) + " " + str(max(N-n,n))) 

else:
	print("3" + " " + str(N-3))