What is the total number of rounds of the end player with a pick number greater than 303?
CREATE TABLE table_name_21 (
    round VARCHAR,
    pick VARCHAR,
    position VARCHAR
)
SELECT COUNT(round) FROM table_name_21 WHERE pick > 303 AND position = "end"
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 total number of rounds of the end player with a pick number greater than 303? ### Input: CREATE TABLE table_name_21 (
    round VARCHAR,
    pick VARCHAR,
    position VARCHAR
) ### Response: SELECT COUNT(round) FROM table_name_21 WHERE pick > 303 AND position = "end"