#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
using ll=long long;
using pii=pair<int,int>;
using pll=pair<ll,ll>;
using vi=vector<int>;
using vl=vector<ll>;
#define pb push_back
#define all(a) begin(a),end(a)

const int N=310,MOD=1e9+7;
const char en='\n';
const ll LLINF=1ll<<60;

int n;
string s,na[N];
char rj[N][N];

void off(int&i,int&j,int dir)
{
	if (dir==0) ++j;
	if (dir==1) ++i;
	if (dir==2) --j;
	if (dir==3) --i;
}

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin>>n;
	for (int i=0;i<n;++i)
	{
		string a;
		cin>>a;
		for (int j=0;j<n;++j) na[i+j].pb(a[j]);
	}
	for (int i=0;i<2*n-1;++i) if (i%2) s+=na[i];
	else
	{
		reverse(all(na[i]));
		s+=na[i];
	}
	for (int i=0;i<=n;++i)
	{
		rj[i][0]='?';
		rj[i][n+1]='?';
		rj[0][i]='?';
		rj[n+1][i]='?';
	}
	int i=1,j=1,dir=0;
	for (int k=0;k<n*n;++k)
	{
		rj[i][j]=s[k];
		int i1=i,j1=j;
		off(i1,j1,dir);
		if (rj[i1][j1])
		{
			dir=(dir+1)%4;
		}
		off(i,j,dir);
	}
	for (int i=1;i<=n;++i,cout<<en) for (int j=1;j<=n;++j) cout<<rj[i][j];
}