public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int testCase = scanner . nextInt ( ) ;
  LinkedList < Integer > list = new LinkedList < > ( ) ;
  LinkedList < Integer > list1 = new LinkedList < > ( ) ;
  LinkedList < Integer > list2 = new LinkedList < > ( ) ;
  for ( int i = 0 ;
  i < testCase ;
  i ++ ) {
    list . add ( scanner . nextInt ( ) ) ;
  }
  for ( int i = 0 ;
  i < testCase - 1 ;
  i ++ ) {
    list1 . add ( scanner . nextInt ( ) ) ;
  }
  for ( int i = 0 ;
  i < testCase - 2 ;
  i ++ ) {
    list2 . add ( scanner . nextInt ( ) ) ;
  }
  list . sort ( Comparator . comparingInt ( o -> o ) ) ;
  list1 . sort ( Comparator . comparingInt ( o -> o ) ) ;
  list2 . sort ( Comparator . comparingInt ( o -> o ) ) ;
  helper ( list , list1 ) ;
  helper ( list1 , list2 ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int testCase = scanner . nextInt ( ) ; LinkedList < Integer > list = new LinkedList < > ( ) ; LinkedList < Integer > list1 = new LinkedList < > ( ) ; LinkedList < Integer > list2 = new LinkedList < > ( ) ; for ( int i = 0 ; i < testCase ; i ++ ) { list . add ( scanner . nextInt ( ) ) ; } for ( int i = 0 ; i < testCase - 1 ; i ++ ) { list1 . add ( scanner . nextInt ( ) ) ; } for ( int i = 0 ; i < testCase - 2 ; i ++ ) { list2 . add ( scanner . nextInt ( ) ) ; } list . sort ( Comparator . comparingInt ( o -> o ) ) ; list1 . sort ( Comparator . comparingInt ( o -> o ) ) ; list2 . sort ( Comparator . comparingInt ( o -> o ) ) ; helper ( list , list1 ) ; helper ( list1 , list2 ) ; }
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