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

if N % 2 == 1:
	if N < 9:
		print(-1)
	else:
		if not ((N-3) in two_pow):
			print(str(min(3,N-3)) + " " + str(max(3,N-3)))
		elif not ((N-5) in two_pow) :
			print(str(min(5,N-5)) + " " + str(max(5,N-5)))
		else:
			print(str(min(6,N-6)) + " " + str(max(6,N-6)))
			
else:
	print(str(min(3,N-3)) + " " + str(max(3,N-3)))