import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        StringBuilder sb = new StringBuilder();
        for (int i = 1; i * 3 <= n; i++) {
            for (int j = i; i + j * 2 <= n; j++) {
                sb.append(i).append(" ").append(j).append(" ").append(n - i - j).append("\n");
            }
        }
        System.out.print(sb);
    }
}