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_54 ( m939_series VARCHAR, m809_series VARCHAR, m39_series VARCHAR )

### Question ###
Name the M939 series with M809 series of m817 and M39 series of m51

### Accurate SQL ###

SELECT m939_series FROM table_name_54 WHERE m809_series = "m817" AND m39_series = "m51"