import math
N=int(input())
a=1
b=1
half=int(N/2)
while a<=half:
    b=N-a
    if math.log2(a)==int(math.log2(a)):
       a+=1
    elif math.log2(b)==int(math.log2(b)):
        a+=1
    else:
        break
if a>half:
    print(-1)
else:
    print('%d %d'%(a,b))