public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  String s = sc . nextLine ( ) ;
  String [ ] c = s . split ( "><" ) ;
  c [ 0 ] = c [ 0 ] . substring ( 1 ) ;
  c [ c . length - 1 ] = c [ c . length - 1 ] . substring ( 0 , 2 ) ;
  int spaces = 0 ;
  for ( int i = 0 ;
  i < c . length ;
  i ++ ) {
    if ( c [ i ] . charAt ( 0 ) != '/' ) {
      for ( int j = spaces ;
      j > 0 ;
      j -- ) System . out . print ( " " ) ;
      System . out . println ( "<" + c [ i ] + ">" ) ;
      spaces += 2 ;
    }
    else {
      spaces -= 2 ;
      for ( int j = spaces ;
      j > 0 ;
      j -- ) System . out . print ( " " ) ;
      System . out . println ( "<" + c [ i ] + ">" ) ;
    }
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; String s = sc . nextLine ( ) ; String [ ] c = s . split ( " > < " ) ; c [ 0 ] = c [ 0 ] . substring ( 1 ) ; c [ c . length - 1 ] = c [ c . length - 1 ] . substring ( 0 , 2 ) ; int spaces = 0 ; for ( int i = 0 ; i < c . length ; i ++ ) { if ( c [ i ] . charAt ( 0 ) != ' / ' ) { for ( int j = spaces ; j > 0 ; j -- ) System . out . print ( " ▁ " ) ; System . out . println ( " < " + c [ i ] + " > " ) ; spaces += 2 ; } else { spaces -= 2 ; for ( int j = spaces ; j > 0 ; j -- ) System . out . print ( " ▁ " ) ; System . out . println ( " < " + c [ i ] + " > " ) ; } } }
(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: (type_identifier) declarator: (variable_declarator name: (identifier) value: (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: (identifier) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (method_invocation object: (array_access array: (identifier) index: (decimal_integer_literal)) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (decimal_integer_literal))) right: (method_invocation object: (array_access array: (identifier) index: (binary_expression left: (field_access object: (identifier) field: (identifier)) right: (decimal_integer_literal))) name: (identifier) arguments: (argument_list (decimal_integer_literal) (decimal_integer_literal))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (array_access array: (identifier) index: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal))) right: (character_literal))) consequence: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (string_literal) right: (array_access array: (identifier) index: (identifier))) right: (string_literal))))) (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal)))) alternative: (block (expression_statement (assignment_expression left: (identifier) right: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (identifier))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (binary_expression left: (string_literal) right: (array_access array: (identifier) index: (identifier))) right: (string_literal)))))))))))