CREATE TABLE table_203_577 (id NUMBER, "tenure" CLOB, "coach" CLOB, "years" NUMBER, "record" CLOB, "pct." NUMBER)

what 's the total combined years for thomas stouch and schwartz ?
SELECT SUM("years") FROM table_203_577 WHERE "coach" IN ('thomas stouch', 'schwartz')
SELECT SUM("years") FROM "table_203_577" WHERE "coach" IN ('thomas stouch', 'schwartz')