#[allow(dead_code)]
#[allow(unused_imports)]
fn read<T: std::str::FromStr>() -> T {
    use std::io::*;
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}
fn main(){
    let mut x:usize = read();
    let mut f:Vec<_> = (0..=x).map(|i| i as i64).collect();
    for i in 1..=x {
        f[i] -= 1;
        let mut mul = 2;
        while i * mul <= x {
            f[i * mul] -= 1;
            mul += 1;
        }
    }
    let mut res = Vec::new();
    let mut ans = 1e18 as i64;
    for i in 1..=x/2 {
        ans = std::cmp::min(ans,(f[i] - f[x - i]).abs());
    }
    for i in 1..=x/2 {
        if ans == (f[i] - f[x - i]).abs() {
            res.push((i,x - i));
            if i != x - i {
                res.push((x - i,i));
            }
        }
    }
    res.sort();
    for i in 0..res.len() {
        println!("{} {}",res[i].0,res[i].1);
    }
}