#include<bits/stdc++.h>

using namespace std;
using ll = long long;

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(a <= b && b <= c && a <= c){
                cout << a << " " << b << " " << c << endl;
            }
        }
    }
    return 0;
}