#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;cin>>n;
  //int k;
  /*
  rep2(i,1,n-2){
    rep2(j,1,n-i){
      k=n-i-j;
      if(i+j+k==n&&k>=1&&k<=n-1)cout<<i<<" "<<j<<" "<<k<<endl;
    }
  }
  */
  rep2(i,1,n-3){
    rep2(j,i,n-2){
      rep2(k,j,n-1){
        //k=n-i-j;
        if(i+j+k==n)cout<<i<<" "<<j<<" "<<k<<endl;
      }
    }
  }
}