def check2(n):
    while n>1:
        if n%2==0:
            n //= 2
        else:
            return False
    return True
N = int(input())
a = 1
flag = -1
while 2*a<=N:
    if check2(a):
        a += 1
    else:
        b = N-a
        if check2(b):
            a += 1
        else:
            flag = (a,b)
            break
if flag==-1:
    print(-1)
else:
    print(*flag)