public static void main ( String [ ] args ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  String s = sc . next ( ) ;
  String t = sc . next ( ) ;
  int N = s . length ( ) ;
  int M = t . length ( ) ;
  char [ ] S = new char [ N ] ;
  char [ ] T = new char [ M ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) S [ i ] = s . charAt ( i ) ;
  for ( int i = 0 ;
  i < M ;
  i ++ ) T [ i ] = t . charAt ( i ) ;
  Arrays . sort ( S ) ;
  Arrays . sort ( T ) ;
  int loop = 0 ;
  if ( N <= M ) {
    loop = N ;
  }
  else {
    loop = M ;
  }
  for ( int i = 0 ;
  i < loop ;
  i ++ ) {
    if ( S [ i ] < T [ ( M - 1 ) - i ] ) {
      System . out . println ( "Yes" ) ;
      return ;
    }
    else if ( S [ i ] > T [ i ] ) {
      System . out . println ( "No" ) ;
      return ;
    }
    else {
      continue ;
    }
  }
  System . out . println ( N < M ? "Yes" : "No" ) ;
}

public static void main ( String [ ] args ) throws Exception { Scanner sc = new Scanner ( System . in ) ; String s = sc . next ( ) ; String t = sc . next ( ) ; int N = s . length ( ) ; int M = t . length ( ) ; char [ ] S = new char [ N ] ; char [ ] T = new char [ M ] ; for ( int i = 0 ; i < N ; i ++ ) S [ i ] = s . charAt ( i ) ; for ( int i = 0 ; i < M ; i ++ ) T [ i ] = t . charAt ( i ) ; Arrays . sort ( S ) ; Arrays . sort ( T ) ; int loop = 0 ; if ( N <= M ) { loop = N ; } else { loop = M ; } for ( int i = 0 ; i < loop ; i ++ ) { if ( S [ i ] < T [ ( M - 1 ) - i ] ) { System . out . println ( " Yes " ) ; return ; } else if ( S [ i ] > T [ i ] ) { System . out . println ( " No " ) ; return ; } else { continue ; } } System . out . println ( N < M ? " Yes " : " No " ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (if_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (identifier)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier))))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement)) alternative: (if_statement condition: (parenthesized_expression (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (identifier)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (return_statement)) alternative: (block (continue_statement)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (ternary_expression condition: (binary_expression left: (identifier) right: (identifier)) consequence: (string_literal) alternative: (string_literal)))))))