CREATE TABLE table_name_51 (ihsaa_class VARCHAR2, size VARCHAR2, mascot VARCHAR2)

What is the IHSAA class of the school with less than 400 students and a mascot of the Tigers?
SELECT ihsaa_class FROM table_name_51 WHERE size < 400 AND mascot = "tigers"
SELECT "ihsaa_class" FROM "table_name_51" WHERE "mascot" = "tigers" AND "size" < 400