#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif
//#pragma GCC optimize("O3")
#include<bits/stdc++.h>
using namespace std;

#define pb push_back

typedef long long ll;
typedef long double ld;
int n;
const int maxN = 105;
char a[maxN][maxN];
char b[maxN][maxN];
bool used[maxN][maxN];
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
#ifdef DEBUG
    freopen("input.txt", "r", stdin);
#endif
    cin >> n;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cin >> a[i][j];
        }
    }
    string T;
    for (int d = 0; d < n + n; d++) {
        if (d % 2 == 1) {
            for (int i = 0; i < n; i++) {
                int x = d - i;
                if (x >= 0 && x < n) {
                    T += (char)a[i][x];
                }
            }
        }
        else {
            for (int i = n - 1; i >= 0; i--) {
                int x = d - i;
                if (x >= 0 && x < n) {
                    T += a[i][x];
                }
            }
        }
    }
    int cur = 0;
    const int dx[4] = {0, 1, 0, -1};
    const int dy[4] = {1, 0, -1, 0};
    int X = 0;
    int Y = 0;
    int dir = 0;
    while (true) {
        while (true) {
            b[X][Y] = T[cur];
            cur += 1;
            used[X][Y] = true;
            X += dx[dir];
            Y += dy[dir];
            if (X < 0 || X >= n || Y < 0 || Y >= n || used[X][Y]) {
                X -= dx[dir];
                Y -= dy[dir];
                break;
            }
        }
        dir = (dir + 1) % 4;
        X += dx[dir];
        Y += dy[dir];
        if (X < 0 || X >= n || Y < 0 || Y >= n || used[X][Y]) {
            break;
        }
    }
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cout << b[i][j];
        }
        cout << '\n';
    }
    return 0;
}