What is the maximum production code of the episode directed by Sean McNamara?
CREATE TABLE table_27610775_1 (
    prod_code INTEGER,
    directed_by VARCHAR
)
SELECT MAX(prod_code) FROM table_27610775_1 WHERE directed_by = "Sean McNamara"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the maximum production code of the episode directed by Sean McNamara? ### Input: CREATE TABLE table_27610775_1 (
    prod_code INTEGER,
    directed_by VARCHAR
) ### Response: SELECT MAX(prod_code) FROM table_27610775_1 WHERE directed_by = "Sean McNamara"