#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fi first
#define se second
const ll mod=998244353;
typedef vector<ll> poly;
const int mb=18;//can change !!!!
int n,z;
pair<int,int>a[1000][4];
vector<int>frogs;
int main(){
	ios::sync_with_stdio(false);cin.tie(0);
	cin >> n;
	while(n%5!=1 && n%5!=3) n++;
	frogs.push_back(1);
	frogs.push_back(2);frogs.push_back(4);frogs.push_back(7);
	int cur=7;
	while(cur<=1000){
		cur+=4;
		frogs.push_back(cur);
	}
	if(n%5==1){
		int m=(n+9)/5;
		for(int i=1; i<=m ;i++){
			for(int j=1; j<min(i,4) ;j++){
				a[i-j][j]={frogs[i]-j,frogs[i]-j+1};
			}
			a[i][0]={frogs[i-1],frogs[i]};
		}
		a[m-2][3]={2,3};
		a[m-1][2]={4,5};
		a[m-1][3]={4,6};
		a[m][1]={7,8};
		a[m][2]={7,9};
		a[m][3]={7,10};
		int cur=a[m][0].se;
		for(int i=4; i<m ;i++){
			a[m+i-3][0]={cur,cur+1};cur++;
			for(int j=1; j<=3 ;j++){
				a[m+i-3][j]={frogs[i],frogs[i+j]};
			}
		}
		z=2*m-4;
	}
	else{
		int m=(n+12)/5;
		for(int i=1; i<=m ;i++){
			for(int j=1; j<min(i,4) ;j++){
				a[i-j][j]={frogs[i]-j,frogs[i]-j+1};
			}
			a[i][0]={frogs[i-1],frogs[i]};
		}
		a[m-2][3]={2,3};
		a[m-1][2]={4,5};
		a[m-1][3]={4,6};
		a[m][1]={7,8};
		a[m][2]={7,9};
		a[m][3]={7,10};
		a[m][0].se--;
		a[m-1][1]={frogs[m-1],frogs[m-1]+1};
		a[m+1][0]={frogs[m-1],frogs[m-1]+2};
		a[m+1][1]={11,12};
		a[m+1][2]={11,13};
		a[m+1][3]={11,14};
		int cur=a[m][0].se;
		for(int i=5; i<m-1 ;i++){
			a[m+i-3][0]={cur,cur+1};cur++;
			for(int j=1; j<=3 ;j++){
				a[m+i-3][j]={frogs[i],frogs[i+j]};
			}
		}
		z=2*m-5;
		
		
	}
	cout << z << '\n';
	for(int i=1; i<=z ;i++){
		for(int j=0; j<4 ;j++){
			cout << a[i][j].se << ' ' << a[i][j].fi << ' ' << a[i][j].se << '\n';
		}
	}
}