Problem: Let us define a magic grid to be a square matrix of integers of size n × n, satisfying the following conditions. 

  * All integers from 0 to (n^2 - 1) inclusive appear in the matrix exactly once. 
  * [Bitwise XOR](https://en.wikipedia.org/wiki/Bitwise_operation#XOR) of all elements in a row or a column must be the same for each row and column. 



You are given an integer n which is a multiple of 4. Construct a magic grid of size n × n.

Input

The only line of input contains an integer n (4 ≤ n ≤ 1000). It is guaranteed that n is a multiple of 4.

Output

Print a magic grid, i.e. n lines, the i-th of which contains n space-separated integers, representing the i-th row of the grid.

If there are multiple answers, print any. We can show that an answer always exists.

Examples

Input


4


Output


8 9 1 13
3 12 7 5
0 2 4 11
6 10 15 14

Input


8


Output


19 55 11 39 32 36 4 52
51 7 35 31 12 48 28 20
43 23 59 15 0 8 16 44
3 47 27 63 24 40 60 56
34 38 6 54 17 53 9 37
14 50 30 22 49 5 33 29
2 10 18 46 41 21 57 13
26 42 62 58 1 45 25 61

Note

In the first example, XOR of each row and each column is 13.

In the second example, XOR of each row and each column is 60.

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long N;
  cin >> N;
  long long mat[N][N];
  long long k = 0;
  long long ch = 0;
  long long times = N / 2;
  long long cnt = 0;
  while (times--) {
    if (cnt % 2 == 0) {
      long long st = cnt * 2;
      long long end = (cnt + 1) * 2;
      for (long long i = 0; i < N; i++) {
        for (long long j = st; j < end; j++) {
          mat[i][j] = k++;
        }
      }
    } else {
      long long st = cnt * 2;
      long long end = (cnt + 1) * 2;
      for (long long i = N - 1; i >= 0; i--) {
        for (long long j = st; j < end; j++) {
          mat[i][j] = k++;
        }
      }
    }
    cnt++;
  }
  for (long long i = 0; i < N; i++) {
    for (long long j = 0; j < N; j++) {
      cout << mat[i][j] << " ";
    }
    cout << "\n";
  }
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.flush();
  long long t = 1;
  while (t--) {
    solve();
  }
}