import java.io.*;
import java.util.*;
import static java.lang.System.*;

public class DonorSort
{
   public static void main(String args[]) throws IOException
   {
      Scanner file = new Scanner(new File("sample.txt"));
      int num = file.nextInt();
      file.nextLine();
      String line1 = file.nextLine();
      String line2 = file.nextLine();

      String temp = "";
      ArrayList<String> group1 = new ArrayList<String>();
      ArrayList<String> group2 = new ArrayList<String>();

      ArrayList<String> lastYear = new ArrayList<String>();
      ArrayList<String> bothYears = new ArrayList<String>();
      ArrayList<String> thisYear = new ArrayList<String>();

//       for(int s=0; s<
      for(int i=0; i<line1.length(); i++)
      {
         if(line1.charAt(i) == ',')
         {
            group1.add('"' + temp + '"');
            temp = "";
            continue;
         }else{
            temp = temp + line1.charAt(i);
         }
      }
      group1.add('"' + temp + '"');
      temp = "";

      for(int x=0; x<line2.length(); x++)
      {
         if(line2.charAt(x) == ',')
         {
            group2.add('"' + temp + '"');
            temp = "";
            continue;
         }else{
            temp = temp + line2.charAt(x);
         }
      }
      group2.add('"' + temp + '"');
      temp = "";

      System.out.println(group1);
      System.out.println(group2);

      for(int i=0; i < group1.size(); i++)
      {
        for(int x=0; x < group2.size(); x++)
        {
          if(group1.get(x).equals(group2.get(x)))
          {
            String holder = group1.get(x);
            bothYears.add(holder);
          }
        }
      }

       System.out.println(lastYear);
       System.out.println(bothYears);
       System.out.println(thisYear);


   }


}