package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	for i := 1; i <= n; i++ {
		for j := i; j <= n; j++ {
			k := n - (i+j)
			if j<=k && i+j+k==n {
				Println(i, j, k)
			}
		}
	}
}