import java.util.Scanner;

public class task05 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine());

        for (int i = 0; i <n-2; i++) {
            String firstPart = repeatStr(" ", n) + "||" + repeatStr("_",n-2) + "||";
            System.out.println(firstPart);
        }


        System.out.println(repeatStr(" ", n-1) + "//" + repeatStr(" ", n) + "\\\\");





        for (int i = 1; i <= n - 4; i++) {

            if (i == (n - 3)/ 2){
                String middlePart = repeatStr(" ", n-2) + "||" + repeatStr(" ", n+2) + "||" + "]";
                System.out.println(middlePart);
            } else {
                String middlePart2 = repeatStr(" ", n-2) + "||" + repeatStr(" ", n+2) + "||";
                System.out.println(middlePart2);
            }



        }






        System.out.println(repeatStr(" ", n-1) + "\\\\" + repeatStr(" ", n) + "//");

        for (int i = 0; i <n-2; i++) {
            String firstPart = repeatStr(" ", n) + "||" + repeatStr("_",n-2) + "||";
            System.out.println(firstPart);
        }





    } static String repeatStr (String text, int count){
        String result ="";
        for (int i = 0; i < count; i++) {
            result += text;
        }
        return result;
    }
}