import math
def log(n):
    return math.log2(n)-int(math.log2(n))

N=int(input())
a=1
b=1
half=int(N/2)

while a<=half:
    b=N-a
    if log(a)==0 or log(b)==0:
       a+=1
    else:
        break
if a>half:
    print(-1)
else:
    print('%d %d'%(a,b))