CREATE TABLE table_33571 ("Type" TEXT, "Suffix" TEXT, "Valency change" TEXT, "Example" TEXT, "Meaning" TEXT)

What is the Suffix of the intensive and valency change of 0?
SELECT "Suffix" FROM table_33571 WHERE "Valency change" = '0' AND "Type" = 'intensive'
SELECT "Suffix" FROM "table_33571" WHERE "Type" = 'intensive' AND "Valency change" = '0'