#include <bits/stdc++.h>
using namespace std;
inline int read() {
  int a = 0, f = 1;
  char ch = getchar();
  for (; !isdigit(ch); ch = getchar())
    if (ch == '-') f = -1;
  for (; isdigit(ch); ch = getchar()) a = (a << 3) + (a << 1) + ch - '0';
  return a * f;
}
const int mod = 1e9 + 7;
const int N = 1e6 + 5;
const int inf = 0x3f3f3f3f;
signed main() {
  int n = read();
  if (n & 1) {
    printf("%d\n", (n - 1) + (n - 1) * ((n - 3) / 2) / 2);
    for (int i = 2; i <= n; i += 2) {
      printf("3 %d %d %d\n", 1, i, i + 1);
      printf("3 %d %d %d\n", 1, i, i + 1);
      for (int j = 2; j < i; j += 2) {
        printf("4 %d %d %d %d\n", i, j, i + 1, j + 1);
        printf("4 %d %d %d %d\n", i, j, i + 1, j + 1);
      }
    }
  } else {
    printf("%d\n", (n - 2) * (n - 2) / 4 + (n - 2));
    puts("4 1 2 3 4");
    puts("4 1 3 4 2");
    puts("4 1 4 2 3");
    for (int i = 5; i <= n; i += 2) {
      printf("3 %d %d %d\n", 1, i, i + 1);
      printf("3 %d %d %d\n", 2, i, i + 1);
      printf("4 %d %d %d %d\n", 1, i, 2, i + 1);
      for (int j = 3; j < i; j += 2) {
        printf("4 %d %d %d %d\n", i, j, i + 1, j + 1);
        printf("4 %d %d %d %d\n", i, j, i + 1, j + 1);
      }
    }
  }
  return 0;
}
