#include<cstdio>
#include <iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>

using namespace std;
typedef long long ll;
typedef pair<int, int> Pr;

int N;

int main()
{
	cin >> N;

	int sum = 0;
	for (int i = 1; i < 3000; i++) {
		for (int j = i; j < 3000; j++) {
			if (N - (i + j) >= j)
				printf("%d %d %d\n",i,j,N-(i+j));
		}
	}
	return 0;
}