public class Blubb {
    public static String geometrie5(int groesse) {

        String figur = "";
        int temp=0, x;
        double y;

        y=groesse/2;
        y= (int) Math.ceil(groesse/2.0);
        x=(int)y;
        for(int i=1; i<=groesse; i++)
        {
            for(int j=1;j<=groesse; j++)
            {
                    if((j>=i && (j<=x) && i<=x) || (j>=i && j>=x && i<=x))
                    {
                        if((j>=i && (j<=x) && i<=x))
                                {
                                temp= x-j+i;
                                figur+=temp;
                                }

                        else
                        {

                                temp = j-x +i;
                                figur+=temp;

                        }
                    }
                    else
                    {
                        figur +=".";
                    }


            }


            figur +="\n";
        }
        return figur;
        }

    public static void main(String args[ ] ){
        System.out.println (geometrie5(9));
        System.out.println("\n");
        System.out.println (geometrie5(7));
        System.out.println("\n");
        System.out.println (geometrie5(5));
        System.out.println("\n");

    }
    }