#include <bits/stdc++.h>
using namespace std;
const int MOD = 1000000007;
vector<vector<int>> result;
int main() {
  int N;
  scanf("%d", &N);
  int K = N % 3 + 3;
  if (K == 3) {
    result.push_back({0, 1, 2});
    result.push_back({0, 1, 2});
  } else if (K == 4) {
    result.push_back({0, 1, 2, 3});
    result.push_back({0, 2, 1, 3});
    result.push_back({0, 1, 3, 2});
  } else if (K == 5) {
    result.push_back({4, 3, 1});
    result.push_back({2, 0, 4});
    result.push_back({3, 4, 1, 2});
    result.push_back({3, 2, 1, 0});
    result.push_back({3, 1, 0});
    result.push_back({2, 0, 4});
  }
  while (K < N) {
    for (int i = 0; i < (3); ++i)
      for (int j = 0; j < (K / 2); ++j) {
        result.push_back({K + i, 2 * j, K + (i + 1) % 3, 2 * j + 1});
      }
    if (K % 2) {
      result.push_back({K, K - 1, K + 1});
      result.push_back({K + 1, K - 1, K + 2});
      result.push_back({K + 2, K - 1, K});
      result.push_back({K, K + 1, K + 2});
    } else {
      result.push_back({K, K + 1, K + 2});
      result.push_back({K, K + 1, K + 2});
    }
    K += 3;
  }
  printf("%d\n", (int)result.size());
  for (auto& v : result) {
    printf("%d ", (int)v.size());
    for (auto k : v) printf("%d ", k + 1);
    printf("\n");
  }
}
