package Others;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.Scanner;

public class SkylineProblem {
 Building[] building;
 int count;

 public void run() {
 Scanner sc = new Scanner(System.in);

 int num = sc.nextInt();
 this.building = new Building[num];

 for (int i = 0; i < num; i++) {
 String input = sc.next();
 String[] data = input.split(",");
 this.add(Integer.parseInt(data[0]), Integer.parseInt(data[1]), Integer.parseInt(data[2]));
 }
 this.print(this.findSkyline(0, num - 1));

 sc.close();
 }

 public void add(int left, int height, int right) {
 building[count++] = new Building(left, height, right);
 }

 public void print(ArrayList<Skyline> skyline) {
 Iterator<Skyline> it = skyline.iterator();

 while (it.hasNext()) {
 Skyline temp = it.next();
 System.out.print(temp.coordinates + "," + temp.height);
 if (it.hasNext()) {
 System.out.print(",");
 }
 }
 }

 public ArrayList<Skyline> findSkyline(int start, int end) {
 if (start == end) {
 ArrayList<Skyline> list = new ArrayList<>();
 list.add(new Skyline(building[start].left, building[start].height));
 list.add(new Skyline(building[end].right, 0));

 return list;
 }

 int mid = (start + end) / 2;

 ArrayList<Skyline> sky1 = this.findSkyline(start, mid);
 ArrayList<Skyline> sky2 = this.findSkyline(mid + 1, end);

 return this.mergeSkyline(sky1, sky2);
 }

 public ArrayList<Skyline> mergeSkyline(ArrayList<Skyline> sky1, ArrayList<Skyline> sky2) {
 int currentH1 = 0, currentH2 = 0;
 ArrayList<Skyline> skyline = new ArrayList<>();
 int maxH = 0;

 while (!sky1.isEmpty() && !sky2.isEmpty()) {
 if (sky1.get(0).coordinates < sky2.get(0).coordinates) {
 int currentX = sky1.get(0).coordinates;
 currentH1 = sky1.get(0).height;

 if (currentH1 < currentH2) {
 sky1.remove(0);
 if (maxH != currentH2) skyline.add(new Skyline(currentX, currentH2));
 } else {
 maxH = currentH1;
 sky1.remove(0);
 skyline.add(new Skyline(currentX, currentH1));
 }
 } else {
 int currentX = sky2.get(0).coordinates;
 currentH2 = sky2.get(0).height;

 if (currentH2 < currentH1) {
 sky2.remove(0);
 if (maxH != currentH1) skyline.add(new Skyline(currentX, currentH1));
 } else {
 maxH = currentH2;
 sky2.remove(0);
 skyline.add(new Skyline(currentX, currentH2));
 }
 }
 }

 while (!sky1.isEmpty()) {
 skyline.add(sky1.get(0));
 sky1.remove(0);
 }

 while (!sky2.isEmpty()) {
 skyline.add(sky2.get(0));
 sky2.remove(0);
 }

 return skyline;
 }

 public class Skyline {
 public int coordinates;
 public int height;

 public Skyline(int coordinates, int height) {
 this.coordinates = coordinates;
 this.height = height;
 }
 }

 public class Building {
 public int left;
 public int height;
 public int right;

 public Building(int left, int height, int right) {
 this.left = left;
 this.height = height;
 this.right = right;
 }
 }

 public static void main(String[] args) {
 SkylineProblem skylineProblem = new SkylineProblem();
 skylineProblem.run();
 }
}