import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
        int height = new Scanner(System.in).nextInt();
        printCross(height);
    }
 
    private static void printCross(int height) {
        for (int i = 0; i < height; i++) {
            StringBuilder sb = getEmptySbWithLengthOfN(height);
            sb.setCharAt(i, 'X');
            sb.setCharAt(height - i - 1, 'X');
            System.out.println(sb);
 
        }
    }
 
    private static StringBuilder getEmptySbWithLengthOfN(int height) {
        StringBuilder sb = new StringBuilder("");
        for (int i = 0; i < height; i++) {
            sb.append(" ");
        }
        return sb;
    }
 
    private static void printNspaces(int n) {
        for (int i = 0; i < n; i++) {
            System.out.print(" ");
        }
    }
}

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