public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int l = scanner . nextInt ( ) , r = scanner . nextInt ( ) ;
  boolean flag = false ;
  for ( int i = l ;
  i <= r ;
  i ++ ) {
    int a = i , t = 0 ;
    HashSet < Integer > set = new HashSet < > ( ) ;
    while ( a > 0 ) {
      set . add ( a % 10 ) ;
      a /= 10 ;
      t ++ ;
    }
    if ( set . size ( ) == t ) {
      System . out . println ( i ) ;
      flag = false ;
      break ;
    }
    else {
      flag = true ;
    }
  }
  if ( flag ) System . out . println ( - 1 ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int l = scanner . nextInt ( ) , r = scanner . nextInt ( ) ; boolean flag = false ; for ( int i = l ; i <= r ; i ++ ) { int a = i , t = 0 ; HashSet < Integer > set = new HashSet < > ( ) ; while ( a > 0 ) { set . add ( a % 10 ) ; a /= 10 ; t ++ ; } if ( set . size ( ) == t ) { System . out . println ( i ) ; flag = false ; break ; } else { flag = true ; } } if ( flag ) System . out . println ( - 1 ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (false))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal))))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (expression_statement (update_expression (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement)) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (true))))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal))))))))