package Streams;
 
import java.util.*;
class answer{
	private static Scanner sc;
	public static void main(String []args){
		sc = new Scanner(System.in);
		int n;
		char a[][]=new char [1000][1000];
		n=sc.nextInt();
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				a[i][j]=sc.next().charAt(0);
			}
		}
		/*to print the main diagonal*/
		for(int i=0;i<n;i++){
			System.out.print(a[i][i]+" ");
		}
		System.out.println();
		/*to print the reserve diagonal*/
		for(int i=0;i<n;i++){
			System.out.print(a[i][n-i-1]+" ");
		}
	}
}
 
 

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