CREATE TABLE table_204_564 (id DECIMAL, "devanagari" TEXT, "iso 15919" TEXT, "unrsgn" TEXT, "iast" TEXT, "comment" TEXT)

what iast is listed before the o ?
SELECT "iast" FROM table_204_564 WHERE id = (SELECT id FROM table_204_564 WHERE "iast" = 'o') - 1
SELECT "iast" FROM "table_204_564" WHERE "id" = (SELECT "id" FROM "table_204_564" WHERE "iast" = 'o') - 1