What was the title of the episode with a production code of 3x6404?
CREATE TABLE table_27776266_1 (title VARCHAR, production_code VARCHAR)
SELECT title FROM table_27776266_1 WHERE production_code = "3X6404"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_27776266_1 (title VARCHAR, production_code VARCHAR) Question: What was the title of the episode with a production code of 3x6404? [/INST] SELECT title FROM table_27776266_1 WHERE production_code = "3X6404" </s>