Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_23944006_4 (surface VARCHAR, score VARCHAR)
### Question:
Name the number of surfaces for  4-6, 2-6
### Answer:
SELECT COUNT(surface) FROM table_23944006_4 WHERE score = "4-6, 2-6"