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();

    let mut out = Vec::new();
    for i in 1..n {
        for j in i..n - i {
            if n - i - j >= j {
                writeln!(out, "{} {} {}", i, j, n - i - j).ok();
            }
        }
    }
    stdout().write_all(&out).unwrap();
}