import java.util.Scanner;
import java.util.Stack;

public class Main {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        int n = Integer.parseInt(reader.nextLine());
        String[] input = new String[n];
        Stack<String> closers = new Stack<>();
        int spaceCounter =0;

        for (int i = 0; i <n ; i++) {
            input[i] = reader.nextLine();
        }

        for (int i = 0; i <n ; i++) {
            System.out.printf("<%s>%n",input[i]);
            closers.push(String.format("</%s>%n",input[i]));
            if(Integer.parseInt(String.valueOf(input[i].charAt(1))) < Integer.parseInt(String.valueOf(input[i+1].charAt(1)))){
                continue;
            } else {
                System.out.print(closers.pop());
                for (int j = 0; j <closers.size() ; j++) {
                    if(Integer.parseInt(String.valueOf(closers.peek().charAt(3))) >= Integer.parseInt(String.valueOf(input[i+1].charAt(1)))){
                        System.out.print(closers.pop());
                    } else {
                        break;
                    }
                }
            }
        }
    }
}