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_14465871_1 (powershell__cmdlet_ VARCHAR, unix_shell VARCHAR)

### Question ###
How many values of powershell (cmdlet) are valid when unix shell is env, export, set, setenv?

### Accurate SQL ###

SELECT COUNT(powershell__cmdlet_) FROM table_14465871_1 WHERE unix_shell = "env, export, set, setenv"