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_name_13 (ccbs INTEGER, payload_to_gto VARCHAR, upper_stage VARCHAR)
### Question:
What is the greatest CCBs with a Payload to GTO of –, and an Upper stage of sec?
### Answer:
SELECT MAX(ccbs) FROM table_name_13 WHERE payload_to_gto = "–" AND upper_stage = "sec"