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_222666_1 (former_codes VARCHAR, new_country_names_and_codes VARCHAR)
### Question:
Name the former codes for  merged into panama ( pa , pan , 591 )
### Answer:
SELECT former_codes FROM table_222666_1 WHERE new_country_names_and_codes = "Merged into Panama ( PA , PAN , 591 )"