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 All_documents (document_type_code VARCHAR)
### Question:
Show the number of documents with document type code CV or BK.
### Answer:
SELECT COUNT(*) FROM All_documents WHERE document_type_code = "CV" OR document_type_code = "BK"