What was the aircraft flown when the axis unit was luftwaffe (**) and the enemy aircraft was ju.88?
CREATE TABLE table_name_40 (
    aircraft_flown VARCHAR,
    axis_unit VARCHAR,
    enemy_aircraft VARCHAR
)
SELECT aircraft_flown FROM table_name_40 WHERE axis_unit = "luftwaffe (**)" AND enemy_aircraft = "ju.88"
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 was the aircraft flown when the axis unit was luftwaffe (**) and the enemy aircraft was ju.88? ### Input: CREATE TABLE table_name_40 (
    aircraft_flown VARCHAR,
    axis_unit VARCHAR,
    enemy_aircraft VARCHAR
) ### Response: SELECT aircraft_flown FROM table_name_40 WHERE axis_unit = "luftwaffe (**)" AND enemy_aircraft = "ju.88"