What is the Hanja for McCune-Reischauer of ch n?
CREATE TABLE table_42575 (
    "Hangul" text,
    "Hanja" text,
    "Revised" text,
    "McCune-Reischauer" text,
    "2000 n South Korea population *" real
)
SELECT "Hanja" FROM table_42575 WHERE "McCune-Reischauer" = 'chŏn'
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 Hanja for McCune-Reischauer of ch n? ### Input: CREATE TABLE table_42575 (
    "Hangul" text,
    "Hanja" text,
    "Revised" text,
    "McCune-Reischauer" text,
    "2000 n South Korea population *" real
) ### Response: SELECT "Hanja" FROM table_42575 WHERE "McCune-Reischauer" = 'chŏn'