#include <bits/stdc++.h>
using namespace std;
const int N = 301;
const int M = 100001;
const int K = 4;
int a[M][K];
int f[N];
int n, m, i, j, k, x, y, t, u, v;
void make(int &k, int w, int x, int y, int z) {
  k++;
  a[k][0] = w;
  a[k][1] = x;
  a[k][2] = y;
  a[k][3] = z;
}
int main() {
  scanf("%d", &n);
  if (n & 1) {
    f[2] = f[3] = 1;
  } else {
    f[1] = 3;
    f[2] = 4;
    f[3] = 1;
    f[4] = 2;
  }
  for (i = 5 ^ (n & 1); i < n; i += 2) {
    x = i;
    y = i + 1;
    if (n & 1)
      f[x] = f[y] = 1;
    else {
      f[x] = 1;
      f[y] = 2;
      make(m, y, 1, f[1], 2);
      f[1] = x;
    }
    for (j = 3 ^ (n & 1); j < i; j += 2) {
      u = j;
      v = j + 1;
      make(m, y, u, f[u], v);
      f[u] = x;
      make(m, x, u, f[v], v);
      f[v] = y;
    }
  }
  printf("%d\n", m + ((n >> 1) << 1));
  for (i = 1 + (n & 1); i < n; i += 2) {
    printf("3 %d %d %d\n", i, i + 1, f[i]);
    printf("3 %d %d %d\n", i, i + 1, f[i + 1]);
  }
  for (i = 1; i <= m; i++) {
    printf("4 ");
    for (j = 0; j <= 3; j++) printf("%d ", a[i][j]);
    printf("\n");
  }
  return 0;
}
