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_7 (years INTEGER, lost VARCHAR, tied VARCHAR, total_games VARCHAR)

### Question ###
What is the year total for teams with under 37 games tied, over 33 games, and 15 losses?

### Accurate SQL ###

SELECT SUM(years) FROM table_name_7 WHERE tied < 37 AND total_games > 33 AND lost = 15