N = int(input())


def is_pow2(x):
    while x > 0 and x % 2 == 0:
        x //= 2
    return x == 1


for i in range(1, N):
    x, y = i, N - i
    if not is_pow2(x) and not is_pow2(y):
        print(x, y)
        exit()

print(-1)