#include <bits/stdc++.h>
#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...) void(0)
#endif

using namespace std;

typedef long long ll;
#define all(x) begin(x), end(x)
constexpr int INF = (1 << 30) - 1;
constexpr long long IINF = (1LL << 60) - 1;
constexpr int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};

template <class T> istream& operator>>(istream& is, vector<T>& v) {
    for (auto& x : v) is >> x;
    return is;
}

template <class T> ostream& operator<<(ostream& os, const vector<T>& v) {
    auto sep = "";
    for (const auto& x : v) os << exchange(sep, " ") << x;
    return os;
}

template <class T, class U = T> bool chmin(T& x, U&& y) { return y < x and (x = forward<U>(y), true); }

template <class T, class U = T> bool chmax(T& x, U&& y) { return x < y and (x = forward<U>(y), true); }

template <class T> void mkuni(vector<T>& v) {
    sort(begin(v), end(v));
    v.erase(unique(begin(v), end(v)), end(v));
}

template <class T> int lwb(const vector<T>& v, const T& x) { return lower_bound(begin(v), end(v), x) - begin(v); }

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N;
    cin >> N;
    vector<string> S(N);
    cin >> S;

    string ord = "";
    for (int i = 0, d = 1; i <= 2 * (N - 1); i++, d ^= 1) {
        if (d == 0) {
            for (int x = 0; x < N; x++) {
                int y = i - x;
                if (y < 0 or N <= y) continue;
                ord += S[x][y];
            }
        } else {
            for (int x = N - 1; x >= 0; x--) {
                int y = i - x;
                if (y < 0 or N <= y) continue;
                ord += S[x][y];
            }
        }
    }
    debug(ord);
    vector<string> ans(N, string(N, '.'));
    {
        int x = 0, y = 0, cur = 1;
        for (int i = 0; i < N * N; i++) {
            ans[x][y] = ord[i];
            int nx = x + dx[cur], ny = y + dy[cur];
            if (clamp(nx, 0, N - 1) != nx or clamp(ny, 0, N - 1) != ny or ans[nx][ny] != '.') {
                cur = (cur + 3) % 4;
                nx = x + dx[cur], ny = y + dy[cur];
            }
            x = nx, y = ny;
        }
    }

    for (auto& s : ans) cout << s << '\n';
    return 0;
}