Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_55 ( chassis VARCHAR, points VARCHAR, engine VARCHAR, entrant VARCHAR )

### Question ###
What is the chassis of Officine Alfieri Maserati with a Maserati Straight-6 engine and fewer than 6 points?

### Accurate SQL ###

SELECT chassis FROM table_name_55 WHERE engine = "maserati straight-6" AND entrant = "officine alfieri maserati" AND points < 6