# include <stdio.h>
# include <math.h>
# include <string.h>

int main ( void ) {
	int n = 0;
	char ast[20];
	char symb[3] = " *";
	if ( scanf( "%d", &n ) == 1 ) {
		if ( n % 2 == 0 ) {		//if n is even

		}

		else {					//if n is odd
			for ( int i = 0; i <= n-1; i++ ) {
				int middle = n+i+1;
				strcat(ast, symb);
				printf( "%*s\n", middle, ast);
			}
			for ( int i = 0; i <= n-1; i++ ) {
				ast[strlen(ast)-2] = '\0';
				int middle = 2*n-i-1;
				printf( "%*s\n", middle, ast );
			}
		}
	}
	else {
		printf( "provide proper input." );
	}
}