#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define GET_ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000007;

int main(){
  int n;
  cin>>n;
  int a,b,c;
  rep(i,1,n/3+1){
    a=i;
    rep(j,i,n/2+1){
      b=j;
      c=n-a-b;
      if(c>=b)print(a<<" "<<b<<" "<<c<<" ");
    }
  }
}