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_72 (long INTEGER, gain VARCHAR, loss VARCHAR)

### Question ###
What is the average long that has 1581 as a gain, with a loss less than 308?

### Accurate SQL ###

SELECT AVG(long) FROM table_name_72 WHERE gain = 1581 AND loss < 308