use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: usize = itr.next().unwrap().parse().unwrap();

    for i in 1..n {
        if i & (i - 1) == 0 {
            continue;
        } else {
            if (n - i) & (n - i - 1) != 0 {
                println!("{} {}", i, n - i);
                return;
            }
        }
    }
    println!("-1");
}