/***************************************************
 * Author    : CS Developers
 * Author URI: https://www.comscidev.com
 * Facebook  : https://www.facebook.com/CSDevelopers
 ***************************************************/

#include<stdio.h>

int main()
{
	int loop = 9;
	int i;
	int j;
	
	for(i = 1; i <= loop; i++){
	
		for(j = 1; j<= i; j++){
		   printf(" ");
	    }
	    
		for(j = 1; j <= (loop-i)+1; j++){
	    	printf("%d", j);
		}
		
		for(j = loop-i; j >= 1; j--){
	    	printf("%d", j);
		}
		
		printf("\n");
	}
	
	return 0;
}