import java.util.Scanner;



public class PrintPyramid {

  public static void main(String[] args) {

    // Create a Scanner
    Scanner scanner = new Scanner(System.in);



    // Prompt the user to enter the number of lines
    System.out.print("Enter the number of lines: ");

    int numberOfLines = scanner.nextInt();



    if (numberOfLines < 1 || numberOfLines > 15) {

      System.out.println("You must enter a number from 1 to 15");

      System.exit(0);

    }



    // Print lines
    for (int row = 1; row <= numberOfLines; row++) {

      // Print NUMBER_OF_LINES  row) leading spaces
      for (int column = 1; column <= numberOfLines - row; column++)

        System.out.print("   ");



      // Print leading numbers row, row  1, ..., 1
      for (int num = row; num >= 1; num--)

        System.out.print((num >= 10) ? " " + num : "  " + num);



      // Print ending numbers 2, 3, ..., row  1, row
      for (int num = 2; num <= row; num++)

        System.out.print((num >= 10) ? " " + num : "  " + num);



      // Start a new line
      System.out.println();

    }

  }

}