#include <iostream>
#include <string>
#include<algorithm>
using namespace std;
int main() {

	int N;
	cin >> N;


	for (int a=1; a<=N; a++) {
		for (int b=a; b <=N; b++) {
			for (int c=b; c <=N ; c++) {
				if (a + b + c == N) {
					cout << a << " " << b << " " << c << endl;
				}
			}
		}
	}
	return 0;

}