n = int(input())
i = 0
S = []
while 2**i <= n:
    S.append(2**i)
    i += 1

T = set(S)
for a in S:
    b = n-a
    T.add(b)

if len(T) == n-1:
    print(-1)
    exit()

for i in range(1, n+1):
    if i not in T:
        print(i, n-i)
        exit()