import math

n = int(input())
alist = [x for x in range(1, n) if math.frexp(x)[0] != 0.5]

for (i, a1) in enumerate(alist):
    if a1 > n/2:
        print('-1')
        exit()
    for a2 in alist[i+1:]:
        if a1+a2 == n:
            print(a1, a2)
            exit()
print('-1')