#include <bits/stdc++.h>
using namespace std;
vector<vector<int> > ans;
void add3(int a, int b, int c) { ans.push_back({a, b, c}); }
void add4(int a, int b, int c, int d) { ans.push_back({a, b, c, d}); }
void solve(int N) {
  if (N == 3)
    add3(1, 2, 3), add3(1, 2, 3);
  else if (N == 4)
    add3(1, 2, 3), add3(1, 2, 4), add3(1, 3, 4), add3(2, 3, 4);
  if (N <= 4) return;
  solve(N - 2);
  int s = N, t = N - 1;
  for (int i = 1; i <= N - 3; i++) add4(s, i, t, i + 1);
  add3(s, N - 2, t), add3(s, 1, t);
}
void print() {
  printf("%d", ans.size());
  for (auto v : ans) {
    printf("\n%d ", v.size());
    for (auto it : v) printf("%d ", it);
  }
}
int main() {
  int N;
  scanf("%d", &N);
  solve(N);
  print();
  return 0;
}
