#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <string>
#include <queue>
#include <stack>
#include <math.h>
#include <set>
#include <cstdio>
#define ALL(obj) (obj).begin(),(obj).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define P pair<int, int>

#define MOD 1000000007
#define INF 1012345678
#define NINF (-2147483647-1)
#define LLINF 9223372036854775807
using ll = long long;
using namespace std;

int main() {
    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; b++)
        {
            if (N - a - b >= b) {
                cout << a << " " << b << " " << N - a - b << endl;
            }
            else {
                break;
            }
        }
    }
    getchar(); getchar();
}