what is the number of countries they have played ?
CREATE TABLE table_203_648 (
    id number,
    "date" text,
    "opposition" text,
    "result" text,
    "score" text,
    "brazil scorers" text,
    "competition" text
)
SELECT COUNT(DISTINCT "opposition") FROM table_203_648
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 number of countries they have played ? ### Input: CREATE TABLE table_203_648 (
    id number,
    "date" text,
    "opposition" text,
    "result" text,
    "score" text,
    "brazil scorers" text,
    "competition" text
) ### Response: SELECT COUNT(DISTINCT "opposition") FROM table_203_648