package com.company;

import javafx.fxml.FXMLLoader;
import org.w3c.dom.ls.LSOutput;

import java.io.IOException;
import java.util.Arrays;
import java.util.Scanner;

public class Main {

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



        for (int i = 1; i <=n ; i++)
        {
         int[] input = Arrays.stream(scanner.nextLine().split(" ")).mapToInt(e->Integer.parseInt(e)).toArray();
            if (i % 2 ==0)
            {
                firstArray[i-1] = input[0];
                secondArray[i-1]= input[1];
            }
       else
           {
               firstArray[i-1] = input[1];
               secondArray[i-1]= input[0];
           }
        }

        System.out.println(Arrays.toString(secondArray));
        System.out.println(Arrays.toString(firstArray));




    }
}