Name the total number of production code for episode by steve cohen & andrew dettman
CREATE TABLE table_24456 (
    "No." real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. viewers (million)" text,
    "Original air date" text,
    "Production code" real
)
SELECT COUNT("Production code") FROM table_24456 WHERE "Written by" = 'Steve Cohen & Andrew Dettman'
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: Name the total number of production code for episode by steve cohen & andrew dettman ### Input: CREATE TABLE table_24456 (
    "No." real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "U.S. viewers (million)" text,
    "Original air date" text,
    "Production code" real
) ### Response: SELECT COUNT("Production code") FROM table_24456 WHERE "Written by" = 'Steve Cohen & Andrew Dettman'