CREATE TABLE table_43778 ("City" TEXT, "Country" TEXT, "IATA" TEXT, "ICAO" TEXT, "Airport" TEXT)

What is IATA, when ICAO is 'VHHH'?
SELECT "IATA" FROM table_43778 WHERE "ICAO" = 'vhhh'
SELECT "IATA" FROM "table_43778" WHERE "ICAO" = 'vhhh'