#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

int N;
int grid[100][100];

int main() {
  cin >> N;
  for (int i = 0; i < N; i++) {
    for (int j = i; j <= N + i; j++) {
      grid[i][j - i] = (j % N) + 1; 
    }
  }
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < N; j++) {
      cout << grid[i][j] << " \n"[j == N - 1];
    }
  }
  return 0;
}