#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
using pi3 = pair<pii, int>;
using pi4 = pair<pii, pii>;
vector<pi3> ans3;
vector<pi4> ans4;
void add(int u, int v, int st, int ed) {
  for (int i = st; i < ed; i++) ans4.push_back({{u, i}, {v, i + 1}});
  ans4.push_back({{u, ed}, {v, st}});
}
void calc(int n, int st) {
  st--;
  if (n == 3) {
    ans3.push_back({{st + 1, st + 2}, st + 3});
    ans3.push_back({{st + 1, st + 2}, st + 3});
  }
  if (n == 4) {
    ans3.push_back({{st + 1, st + 2}, st + 3});
    ans3.push_back({{st + 2, st + 3}, st + 4});
    ans3.push_back({{st + 3, st + 4}, st + 1});
    ans3.push_back({{st + 4, st + 1}, st + 2});
  }
  if (n == 5) {
    ans4.push_back({{st + 1, st + 2}, {st + 3, st + 4}});
    ans4.push_back({{st + 1, st + 3}, {st + 2, st + 4}});
    ans3.push_back({{st + 5, st + 1}, st + 2});
    ans3.push_back({{st + 5, st + 1}, st + 3});
    ans3.push_back({{st + 5, st + 3}, st + 4});
    ans3.push_back({{st + 5, st + 2}, st + 4});
  }
  if (n == 6) {
    ans3.push_back({{st + 1, st + 2}, st + 3});
    ans3.push_back({{st + 4, st + 5}, st + 6});
    ans4.push_back({{st + 1, st + 5}, {st + 2, st + 4}});
    ans4.push_back({{st + 1, st + 6}, {st + 3, st + 4}});
    ans4.push_back({{st + 2, st + 6}, {st + 3, st + 5}});
    ans4.push_back({{st + 1, st + 2}, {st + 4, st + 5}});
    ans4.push_back({{st + 2, st + 3}, {st + 5, st + 6}});
    ans4.push_back({{st + 1, st + 3}, {st + 4, st + 6}});
  }
}
int main() {
  int n;
  scanf("%d", &n);
  int st = 1;
  int m = n;
  while (m > 6) {
    add(st, st + 1, st + 4, n);
    add(st + 2, st + 3, st + 4, n);
    calc(4, st);
    m -= 4;
    st += 4;
  }
  calc(m, st);
  cout << ans3.size() + ans4.size() << endl;
  for (pi3 p : ans3)
    printf("3 %d %d %d\n", p.first.first, p.first.second, p.second);
  for (pi4 p : ans4)
    printf("4 %d %d %d %d\n", p.first.first, p.first.second, p.second.first,
           p.second.second);
  return 0;
}
