#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(false);
	int n;
	cin>>n;
	vector<string> s(n+5),t(n+5,string(n+5,' '));
	for(int i=1;i<=n;i++)
	{
		cin>>s[i];
		s[i]=' '+s[i];
	}
	string tmp;
	for(int S=2;S<=n+n;S++)
	{
		if(S%2==0)
		{
			for(int Y=1;Y<=n;Y++)
			{
				int X=S-Y;
				if(1<=X and X<=n)
					tmp+=s[X][Y];
			}
		}
		else
		{
			for(int Y=n;Y>=1;Y--)
			{
				int X=S-Y;
				if(1<=X and X<=n)
					tmp+=s[X][Y];
			}
		}
	}
	vector<vector<int>> vis(n+5,vector<int>(n+5));
	for(int i=1;i<=n;i++)vis[0][i]=vis[i][0]=vis[n+1][i]=vis[i][n+1]=1;
	vector<int> dx={0,1,0,-1},dy={1,0,-1,0};
	int idx=0,d=0,X=1,Y=1;
	while(idx<n*n)
	{
//		cerr<<"!! "<<X<<' '<<Y<<' '<<idx<<endl;
		t[X][Y]=tmp[idx++];
		vis[X][Y]=1;
		if(vis[X+dx[d]][Y+dy[d]])
			d=(d+1)%4;
		X+=dx[d],Y+=dy[d];
	}
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=n;j++)
			cout<<t[i][j];
		cout<<endl;
	}
	return 0;
}