#include <bits/stdc++.h>
using namespace std;
vector<int> dx = {0, 1, 0, -1};
vector<int> dy = {1, 0, -1, 0};
int main(){
  int N;
  cin >> N;
  vector<vector<char>> c(N, vector<char>(N));
  for (int i = 0; i < N; i++){
    for (int j = 0; j < N; j++){
      cin >> c[i][j];
    }
  }
  vector<string> s(N * 2 - 1);
  for (int i = 0; i < N; i++){
    for (int j = 0; j < N; j++){
      s[i + j] += c[i][j];
    }
  }
  for (int i = 0; i < N * 2 - 1; i += 2){
    reverse(s[i].begin(), s[i].end());
  }
  string S;
  for (int i = 0; i < N * 2 - 1; i++){
    S += s[i];
  }
  int x = 0, y = -1, p = 0;
  vector<vector<char>> ans(N, vector<char>(N));
  for (int i = N * 2; i >= 2; i--){
    int d = (N * 2 - i) % 4;
    for (int j = 0; j < i / 2; j++){
      x += dx[d];
      y += dy[d];
      ans[x][y] = S[p];
      p++;
    }
  }
  for (int i = 0; i < N; i++){
    for (int j = 0; j < N; j++){
      cout << ans[i][j];
    }
    cout << endl;
  }
}