import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        Task solver = new Task();
        solver.solve(1, in, out);
        out.close();
    }

    static class Task {
        static HashSet<Long> twoPow = new HashSet<>();

        static void setTwoPow(long max) {
            long n = 2;
            while (n < max) {
                twoPow.add(n);
                n *= 2;
            }
        }

        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long n = in.nextLong();
            setTwoPow(n);
            long a = n / 2;
            long b = n - a;

            while (a > 0 && twoPow.contains(a) || twoPow.contains(b)) {
                a--;
                b++;
            }

            if (a <= 0) {
                out.println(-1);
            } else {
                out.println(a + " " + b);
            }
        }

    }
}