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

N=int(input())
a=3
b=1
half=int(N/2)

while a<=half:
    b=N-a
    if log(a)==0:
        a+=1
    elif log(b)==0:
        if b!=2**math.log2(b):
            break
        else:
            a+=1
    
    else:
        break
if a>half:
    print(-1)
else:
    print('%d %d'%(a,b))