#include<bits/stdc++.h>
using namespace std;

#define int long long

#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
typedef vector<int>vint;
typedef pair<int,int>pint;
typedef vector<pint>vpint;

template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;}
template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;}

int N;

signed main(){
    scanf("%lld",&N);

    for(int i=1;i<=N;i++){
        for(int j=i;i+j<=N;j++){
            int k=N-i-j;
            if(j>k)continue;
            printf("%lld %lld %lld\n",i,j,k);
        }
    }
    return 0;
}