n=int(input())
l=[1]
t=2
while t<=n:
    l.append(t)
    t*=2
for a in range(1,n+1):
    for t in l:
        if a==t:
            break
    else:
        b=n-a
        if b<1:continue
        for t in l:
            if b==t:
                break
        else:
            print(a,b)
            break
else:
    print(-1)