#include <iostream>
#include <cstdio>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>

using namespace std;

#define REP(i,n)	for(int i=0;i<(n);++i)
#define REPS(i,s,t)	for(int i=(s);i<(t);++i)

#define INF 		2000000007
#define MINF		-200000007
#define MOD			1048576 	
// 2^20

#define MAX 		1000005

typedef unsigned int 			uint;
typedef unsigned long long int	ull;
typedef long long int 			ll;

//int dp[MAX];

int main(){
	int N;cin>>N;

	REPS(a,1,N/3+1){
		int b=a,c=N-a-b;
		while(b <= c){
			printf("%d %d %d\n",a,b,c);
			b++;c--;
		}
	}

	return 0;
}