/* -*- coding: utf-8 -*-
 *
 * 522.cc: No.522 Make Test Cases(テストケースを作る) - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int n;
  cin >> n;

  for (int a = 1; a < n; a++)
    for (int b = a; b < n; b++) {
      int c = n - (a + b);
      if (c >= b) printf("%d %d %d\n", a, b, c);
    }
  return 0;
}