JaeHyeonKim19

import java.io.*;
import java.util.Comparator;
import java.util.PriorityQueue;
import java.util.StringTokenizer;

public class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
		StringTokenizer st = new StringTokenizer(" ");
		PriorityQueue<String []> pq = new PriorityQueue<String []>(new Comparator<String []>() {
			@Override
			public int compare(String [] strs1, String [] strs2) {
				int n = strs1.length < strs2.length? strs1.length : strs2.length;
				for(int i = 0; i < n; i++) {
					int temp = strs1[i].compareTo(strs2[i]);
					if(temp == 0) {
						continue;
					}else {
						return temp;
					}
				}
				return strs1.length == n? -1 : 1;
			}
		});
		int n = Integer.parseInt(br.readLine());
		for(int i = 0; i < n; i++) {
			st = new StringTokenizer(br.readLine());
			int k = Integer.parseInt(st.nextToken());
			String [] info = new String[k];
			for(int j = 0; j < k;j++) {
				info[j] = st.nextToken();
			}
			pq.offer(info);
		}
		int index = 0;
		String [] priorInfo = new String[0];
		while(!pq.isEmpty()) {
			String [] curInfo = pq.poll();
			int length = priorInfo.length < curInfo.length ? priorInfo.length : curInfo.length;
			for(int i = 0; i < length; i++) {
				if(!priorInfo[i].equals(curInfo[i])) {
					index = i;
					break;
				}
				if(i == length-1) {
					index = 0;
				}
			}
			for(int i = index; i < curInfo.length; i++) {
				for(int j = 0; j < i; j++) {
					bw.write("--");
				}
				bw.write(curInfo[i] + "\n");
			}
			priorInfo = new String[curInfo.length];
			for(int i = 0; i < curInfo.length; i++) {
				priorInfo[i] = curInfo[i];
			}
		}
		bw.flush();
	}
}