#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;
typedef long long ll;

int main(){
	ll n;cin>>n;
	ll a=n/2,b=n-n/2;
	if(__builtin_popcount(a)==1||__builtin_popcount(b)==1)puts("-1");
	else cout<<a<<' '<<b<<endl;
}