CREATE TABLE table_31729 ("Hangul" TEXT, "Hanja" TEXT, "Revised" TEXT, "McCune-Reischauer" TEXT, "Estimated distribution  ( 2000 ) *" FLOAT)

Tell me the revised of mccune reischauer of y n (s) ry n (n)
SELECT "Revised" FROM table_31729 WHERE "McCune-Reischauer" = 'yŏn (s) ryŏn (n)'
SELECT "Revised" FROM "table_31729" WHERE "McCune-Reischauer" = 'yŏn (s) ryŏn (n)'