3
1 2 3
3 2
2
 3
84 30 9
9 84
9
 4
1 5 7 8
1 5 7
1 5
 3
796067435 964699482 819602309
964699482 796067435
964699482
 10
460626451 802090732 277246428 661369649 388684428 784303821 376287098 656422756 9301599 25720377
277246428 388684428 661369649 460626451 656422756 802090732 9301599 784303821 376287098
376287098 802090732 388684428 9301599 656422756 784303821 460626451 277246428
 6
5 4 3 3 5 5
3 5 5 4 3
3 5 4 3
 3
168638990 939116221 323703261
168638990 323703261
168638990
 3
77 77 77
77 77
77
 3
374054998 726316780 902899520
902899520 726316780
726316780

1
3
 30
84
 8
7
 819602309
796067435
 25720377
661369649
 5
5
 939116221
323703261
 77
77
 374054998
902899520


import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.StringTokenizer;


public class sol {
	//...................... Global Variables .......................//
	static BitSet prime;             // used in seive generation
	// true = not prime     and false = prime
	int prev_avg = 0;
	int n = 0;
	//...................... Global Variables .......................//
	
	
	
	
	
	//===================  PROBLEM SOLVING COMES HERE ===== START  ====================//
	
    void solve() throws IOException, Exception {
      
    	int n= in.nextInt();
    	ArrayList<Integer> al1 = new ArrayList<Integer>();
    	ArrayList<Integer> al2 = new ArrayList<Integer>();
    	
    	for(int i =0;i<n;i++){
    		int temp =in.nextInt();
    		al1.add(temp);
    		al2.add(temp);
    	}
    	//al2 = al1;
    
    	
    	for(int i =0;i<n-1;i++){
    		int temp =in.nextInt();
    		if(al2.contains(temp))
    			al2.remove(Integer.valueOf(temp));
    	}
    	
    	al2.removeAll(al1);
    	  
    	for(int i =0;i<n-2;i++){
    		int temp =in.nextInt();
    		//System.out.println(temp);
    		if(al1.contains(temp))
    			al1.remove(Integer.valueOf(temp));
    	}
    	
    	al1.addAll(al2);
    	
    	for(int m:al1){
    		out.println(m);
    	}
    	
    }
    

    //===================  PROBLEM SOLVING COMES HERE ===== END ======================//
    
    
    
    
    
    
    public static void main(String[] args) throws FileNotFoundException, IOException, Exception {
    	
    	//--------------------------------- Console I/O ------------------------------//
    	   in = new FastScanner(new BufferedReader(new InputStreamReader(System.in)));
           out = new PrintWriter(System.out);
    	//--------------------------------- Console I/O ------------------------------//
    	
    	
    	//--------------------------------- File I/O ---------------------------------//
        //   in = new FastScanner(new BufferedReader(new FileReader("input.txt")));
        //   out = new PrintWriter(new FileWriter("output.txt"));
        //--------------------------------- File I/O ---------------------------------//
        new sol().solve();
        out.close();
    }
    
    
    

		 
		 
    static FastScanner in;
    static PrintWriter out;

    static class FastScanner {
        BufferedReader in;
        StringTokenizer st;

        public FastScanner(BufferedReader in) {
            this.in = in;
        }

        public String nextToken() {
            while (st == null || !st.hasMoreTokens()) {
                try {
                    st = new StringTokenizer(in.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        public int nextInt() { return Integer.parseInt(nextToken()); }
        public long nextLong() { return Long.parseLong(nextToken()); }
        public double nextDouble() { return Double.parseDouble(nextToken()); }
        public BigInteger BigInteger()throws Exception { return new BigInteger(nextToken()); }
        public String next() throws IOException { return nextToken(); }
        public String nextLine() throws IOException { return in.readLine(); }
        
        public int[] readIntArray(int n) {
            int[] ret = new int[n];
            for (int i = 0; i < n; i++) {
                ret[i] = nextInt();
            }
            return ret;
        }
        
        public void printIntArray(int ar[],int n) {
            for (int i = 0; i < n; i++) {
                System.out.print(ar[i] +" ");
            }System.out.println();
        }
        
    }
}