CREATE TABLE table_204_258 (id DECIMAL, "location" TEXT, "frequency" DECIMAL, "call sign" TEXT, "network" TEXT, "call sign meaning" TEXT)

what is the next call sign listed after kdsu ?
SELECT "call sign" FROM table_204_258 WHERE id = (SELECT id FROM table_204_258 WHERE "call sign" = 'kdsu') + 1
SELECT "call sign" FROM "table_204_258" WHERE "id" = (SELECT "id" FROM "table_204_258" WHERE "call sign" = 'kdsu') + 1