n=int(input())
a=2
b=n-2
l=[]
for i in range(100):
    l.append(2**i)
c=n//2
check=False
while a<=c:
    a+=1
    b+=1
    if a not in l and b not in l:
        check=True
        break
if check:
    print(a,b)
else:
    print("-1")