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_21 ( suffix VARCHAR, valency_change VARCHAR, type VARCHAR )

### Question ###
What is the Suffix of the intensive and valency change of 0?

### Accurate SQL ###

SELECT suffix FROM table_name_21 WHERE valency_change = "0" AND type = "intensive"