#include <bits/stdc++.h>
using namespace std;
int n;
vector<vector<int> > cyc[305];
vector<vector<int> > ans;
void pre() {
  vector<int> temp(3);
  for (long long i = 1; i <= 3; i++) temp[i - 1] = i;
  cyc[3].push_back(temp);
  cyc[3].push_back(temp);
  temp = {1, 2, 3};
  cyc[4].push_back(temp);
  temp = {1, 3, 4};
  cyc[4].push_back(temp);
  temp = {1, 2, 4};
  cyc[4].push_back(temp);
  temp = {2, 3, 4};
  cyc[4].push_back(temp);
  for (long long i = 5; i <= 305 - 1; i++) {
    for (long long j = 1; j <= i - 3; j++) {
      vector<int> st;
      st.push_back(i);
      st.push_back(j);
      st.push_back(i - 1);
      st.push_back(j + 1);
      cyc[i].push_back(st);
    }
    vector<int> st;
    st.push_back(i);
    st.push_back(i - 2);
    st.push_back(i - 1);
    cyc[i].push_back(st);
    st.clear();
    st.push_back(i);
    st.push_back(1);
    st.push_back(i - 1);
    cyc[i].push_back(st);
    st.clear();
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  long long precision = numeric_limits<long double>::digits10;
  pre();
  cin >> n;
  while (n >= 3) {
    for (long long j = 0; j < cyc[n].size(); j++) {
      ans.push_back(cyc[n][j]);
    }
    n -= 2;
  }
  cout << ans.size() << "\n";
  for (long long j = 0; j < ans.size(); j++) {
    cout << ans[j].size() << " ";
    for (long long k = 0; k < ans[j].size(); k++) {
      cout << ans[j][k] << " ";
    }
    cout << "\n";
  }
}
