CREATE TABLE table_55265 ("Class" TEXT, "Wheels" TEXT, "Date" TEXT, "Builder" TEXT, "No. Built" FLOAT)

What class has 4-4-0 wheels and was less than number 40 built?
SELECT "Class" FROM table_55265 WHERE "Wheels" = '4-4-0' AND "No. Built" < '40'
SELECT "Class" FROM "table_55265" WHERE "No. Built" < '40' AND "Wheels" = '4-4-0'