What is the abbreviation of the district of Mahbubnagar?
CREATE TABLE table_20562 (
    "Code" text,
    "District" text,
    "Headquarters" text,
    "Population (2011)" real,
    "Area (km\u00b2)" real,
    "Density (/km\u00b2)" real,
    "Official website" text
)
SELECT "Code" FROM table_20562 WHERE "District" = 'Mahbubnagar'
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 abbreviation of the district of Mahbubnagar? ### Input: CREATE TABLE table_20562 (
    "Code" text,
    "District" text,
    "Headquarters" text,
    "Population (2011)" real,
    "Area (km\u00b2)" real,
    "Density (/km\u00b2)" real,
    "Official website" text
) ### Response: SELECT "Code" FROM table_20562 WHERE "District" = 'Mahbubnagar'