#include <bits/stdc++.h>
using namespace std;
using ll=long long;
int main(){
	int n;
	cin>>n;
	int m=2*n-3;
	cout<<m<<endl;
	for(int i=1;i<n;i++){
		cout<<i<<" "<<i+1<<" "<<2*i-1<<endl;
	}
	for(int i=3;i<=n;i++){
		cout<<2<<" "<<i<<" "<<2*i-2<<endl;
	}
	for(int i=1;i<n;i++){
		for(int j=i+1;j<=n;j++){
			if(i==1){
				cout<<(j-i);
				for(int k=1;k<j;k++)cout<<" "<<k;
				cout<<endl;
			}else{
				vector<int> ans;
				for(int k=i-1;k>=2;k--)ans.push_back(k);
				ans.push_back(n+i-2);
				for(int k=i+1;k<j;k++)ans.push_back(k);
				cout<<ans.size();
				for(int x:ans)cout<<" "<<x;
				cout<<endl;
			}
		}
	}
}