What is the combined consumption of the engine with the code k9k 796?
CREATE TABLE "engines" (
  "name" text,
  "code" text,
  "capacity" text,
  "type" text,
  "power" text,
  "torque" text,
  "top_speed" text,
  "combined_consumption" text
);
SELECT "combined_consumption" FROM "engines" WHERE "code"='k9k 796';