#include <bits/stdc++.h>
#define rep(i, a, b) for (int i = a; i <= b; i++)
#define per(i, b, a) for (int i = b; i >= a; i--)
using namespace std;

const int N = 100 + 5;

int n,m;
char s[N][N],t[N][N],a[N*N];

int main() {
#ifdef xay5421
	freopen("a.in","r",stdin);
#endif
	cin>>n;
	rep(i,1,n)scanf("%s",s[i]+1);
	rep(i,2,n+n){
		if(i&1){
			rep(x,1,n){
				int y=i-x;
				if(y>=1&&y<=n){
					a[++m]=s[x][y];
				}
			}
		}else{
			per(x,n,1){
				int y=i-x;
				if(y>=1&&y<=n){
					a[++m]=s[x][y];
				}
			}
		}
	}
	m=0;
	rep(i,1,n){
		rep(j,1,n){
			if(!t[i][j]){
				t[i][j]=a[++m];
			}
		}
		rep(j,1,n){
			if(!t[j][n+1-i]){
				t[j][n+1-i]=a[++m];
			}
		}
		per(j,n,1){
			if(!t[n+1-i][j]){
				t[n+1-i][j]=a[++m];
			}
		}
		per(j,n,1){
			if(!t[j][i]){
				t[j][i]=a[++m];
			}
		}
	}
	rep(i,1,n)puts(t[i]+1);
	return 0;
}

/*
5
THSAD
IIVOP
SEOOH
RGETI             
YMINK
*/