#include <bits/stdc++.h>

using namespace std;

int N;
int dp[3001] = {0};

int main(void){
    
    cin >> N;
    
    int i, j, k;
    for(i = 1; i <= N / 3; ++i){
        for(j = 1; j <= N / 2; ++j){
            if(i <= j){
                if(dp[i + j] != 0){
                    printf("%d %d %d\n", i, j, dp[i + j]);
                }
                else{
                    if(j <= (k = N - (i + j))){
                        dp[i + j] = k;
                        printf("%d %d %d\n", i, j, k);
                    }
                }
            }
        }
    }
    
    return 0;
}