public static void main ( String [ ] args ) {
  Scanner scan = new Scanner ( System . in ) ;
  int n = scan . nextInt ( ) ;
  scan . nextLine ( ) ;
  String [ ] words = scan . nextLine ( ) . split ( " " ) ;
  Set < Set < Character >> roots = new HashSet < > ( ) ;
  for ( String w : words ) {
    Set < Character > root = new HashSet < > ( ) ;
    for ( int i = 0 ;
    i < w . length ( ) ;
    i ++ ) {
      root . add ( w . charAt ( i ) ) ;
    }
    roots . add ( root ) ;
  }
  System . out . println ( roots . size ( ) ) ;
}

public static void main ( String [ ] args ) { Scanner scan = new Scanner ( System . in ) ; int n = scan . nextInt ( ) ; scan . nextLine ( ) ; String [ ] words = scan . nextLine ( ) . split ( " ▁ " ) ; Set < Set < Character > > roots = new HashSet < > ( ) ; for ( String w : words ) { Set < Character > root = new HashSet < > ( ) ; for ( int i = 0 ; i < w . length ( ) ; i ++ ) { root . add ( w . charAt ( i ) ) ; } roots . add ( root ) ; } System . out . println ( roots . size ( ) ) ; }
(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)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) (local_variable_declaration type: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) name: (identifier) arguments: (argument_list (string_literal))))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (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)))) (enhanced_for_statement type: (type_identifier) name: (identifier) value: (identifier) body: (block (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)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (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: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))