#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main()
{
  int n;
  cin >> n;
  int m = n * 2 - 3;
  cout << m << endl;
  for (int i = 0; i < n - 1; ++i) cout << i + 1 << ' ' << i + 2 << ' ' << 2 * i + 1 << endl;
  for (int i = 3; i <= n; ++i) cout << 2 << ' ' << i << ' ' << (i - 1) * 2 << endl;
  for (int i = 2; i <= n; ++i)
  {
    cout << i - 1;
    for (int j = 1; j < i; ++j) cout << ' ' << j;
    cout << endl;
  }
  for (int i = 2; i < n; ++i)
  {
    for (int j = i + 1; j <= n; ++j)
    {
      vector<int> ans;
      for (int k = i - 1; k > 1; --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 (auto v : ans) cout << ' ' << v;
      cout << endl;
    }
  }
}