public static void main ( String [ ] args ) throws IOException {
  BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  String word1 = stdin . readLine ( ) ;
  String word2 = stdin . readLine ( ) ;
  String sorted1 = Arrays . stream ( word1 . split ( "" ) ) . sorted ( ) . collect ( Collectors . joining ( ) ) ;
  String sorted2 = Arrays . stream ( word2 . split ( "" ) ) . sorted ( Comparator . reverseOrder ( ) ) . collect ( Collectors . joining ( ) ) ;
  String answer = sorted2 . compareTo ( sorted1 ) > 0 ? "Yes" : "No" ;
  System . out . println ( answer ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader stdin = new BufferedReader ( new InputStreamReader ( System . in ) ) ; String word1 = stdin . readLine ( ) ; String word2 = stdin . readLine ( ) ; String sorted1 = Arrays . stream ( word1 . split ( " " ) ) . sorted ( ) . collect ( Collectors . joining ( ) ) ; String sorted2 = Arrays . stream ( word2 . split ( " " ) ) . sorted ( Comparator . reverseOrder ( ) ) . collect ( Collectors . joining ( ) ) ; String answer = sorted2 . compareTo ( sorted1 ) > 0 ? " Yes " : " No " ; System . out . println ( answer ) ; }
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