//BigX.java

public class BigX {  

    public static void main (String[] args) {   
	int size = Integer.parseInt(args[0]);

	for (int i=1; i<=size; i++) {
	    for (int j=1; j<=size; j++)
		if (i==j || i==size+1-j)
		    System.out.print("*"); 
		else
		    System.out.print(" "); 
	    System.out.println();    
	}
    }
}


/* 
add border

rectangular

*/