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_28136_15 (rusyn VARCHAR, bulgarian VARCHAR)

### Question ###
How many words are there in rusyn for the bulgarian word купува (kupuva)?

### Accurate SQL ###

SELECT COUNT(rusyn) FROM table_28136_15 WHERE bulgarian = "купува (kupuva)"