#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define loop(i,a,b) for(i=a;i<b;i++)
#define rloop(i,a,b) for(i=a;i>=b;i--)
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
const int inf=1000000001;
const ll INF=1e16;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<<fixed<<p<<endl;
int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};

int main(){
  int n;
  cin>>n;
  int a,b,c;
  //ll now=time(NULL);
  for(a=1;a<=n/3;a++){
    for(b=a;b<=(n-a)/2;b++){
      c=n-a-b;
      if(c>=b){
	cout<<a<<" "<<b<<" "<<c<<endl;
      }
    }
  }
  //cout<<time(NULL)-now<<endl;
}