#include <cstdio>
#include <cmath>
#include <cstring>
#include <ctime>
#include <iostream>
#include <algorithm>
#include <set>
#include <vector>
#include <sstream>
#include <typeinfo>
#include <fstream>
#include <climits>
#include <functional>

#define REP(i,n) for(int i = 0;i < n;i++)

using namespace std;
typedef long long ll;
const int INF = INT_MAX / 4;

const int max_n = 1e3;

int main(void)
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  int N;
  cin >> N;

  for (int a = 1;a <= N/3;a++) {
    for (int b = a;b <= (N-a)/2;b++) {
      cout << a << " " << b << " " << N - a - b << "\n";
    }
  }

  return 0;
}