import java.util.*;
import java.io.PrintWriter;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        int N = sc.nextInt();
        for(int i=1; i<=N/3; i++){
            for(int j=i; j<=N/2; j++){
                int k = N-(i+j);
                if(k>=j){
                    pw.println(i+" "+j+" "+k);
                    pw.flush();
                }else{
                    break;
                }
            }
        }
    }
}