import java.util.Scanner;
public class Triangle {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int n=Integer.parseInt(scanner.nextLine());
        int p=1;
        int m=n;
        int q=n;
        int c=n;
        int en=1;
        int z=0;
        int s=n;
        System.out.println(repeatStr("#",4*n+1));
        z++;//full row

        for (int i = 0; i <n/2 ; i++) {
            System.out.print(repeatStr(".",p));
            System.out.print(repeatStr("#",2*m-1));
            System.out.print(repeatStr(" ",en));
            System.out.print(repeatStr("#",2*m-1));
            System.out.println(repeatStr(".",p));
            p++;
            en=en+2;
            m--;
            z++;
        }
en=en-2;
        System.out.print(repeatStr(".",z));
        System.out.print(repeatStr("#",2*m-1));
        System.out.print(repeatStr(" ",(((en+2)-3))/2));
        System.out.print("(@)");
        System.out.print(repeatStr(" ",(((en+2)-3))/2));
        System.out.print(repeatStr("#",2*m-1));
        System.out.println(repeatStr(".",z));


        z++;
        int v=en;
        for (int d=0;d<n-(s/2+1);d++)
        {
            System.out.print(repeatStr(".",z));
            System.out.print(repeatStr("#",v-1));
           System.out.print(repeatStr(" ",((4*n+1)-(2*z+2*(v-1)))));
            System.out.print(repeatStr("#",v-1));
            System.out.println(repeatStr(".",z));
            z++;
        v=v-2;}

        for(int j=0;j<q;j++)
        {
            System.out.print(repeatStr(".",c+1));
            System.out.print(repeatStr("#",2*n-1));
            System.out.println(repeatStr(".",c+1));
            n=n-1;
            c=c+1;}

    }
    static String repeatStr(String str, int count ){
        String text="";
        {
            for (int j = 0; j <count ; j++) {
                text=text+str;
            }

        }
        return text;
    }
}