import java.util.ArrayList;

import java.util.Scanner;

public class Main {

private static Scanner scanf;

public static void main(String[] args) {

int Cities = 0;

int Queries = 0;

ArrayList<City> CityList = new ArrayList<>();

scanf = new Scanner(System.in);

Cities = scanf.nextInt();

//Queries = scanf.nextInt();

CityList List = new CityList();

List.setCityNo(Cities);

CityList = List.CreateList();

for(int i=0; i<Cities-1; i++){

int c1 = scanf.nextInt();

int c2 = scanf.nextInt();

City C1 = CreateCity(c1);

City C2 = CreateCity(c2);

CreateRoad(CityList.get(c1-1), C2);

CreateRoad(CityList.get(c2-1), C1);

}

for(int i=0; i<Cities; i++){

PrintEachList(CityList.get(i));

System.out.println("-------------------");

}

}

private static City CreateCity(int number){

City Dummy = new City();

Dummy.setAdjacentCitites(null);

Dummy.setCityNumber(number);

Dummy.setNature(0);

return Dummy;

}

private static void CreateRoad(City c1, City c2){

if(c1.getAdjacentCitites()==null){

c1.setAdjacentCitites(c2);

}

else{

CreateRoad(c1.getAdjacentCitites(), c2);

}

}

private static void PrintEachList(City C1){

int i;

if(C1.getAdjacentCitites()!=null){

i = C1.getAdjacentCitites().getCityNumber();

System.out.println(i);

//if(C1.getAdjacentCitites().getAdjacentCitites()!=null){

PrintEachList(C1.getAdjacentCitites());

//}

}

}

}