suchen [und] SGB OA 10-450[0123456789]* or OA 10-45[123456789][0123456789]* or OA 10-4[6789][0123456789][0123456789]* or OA 10-5[0123456789][0123456789][0123456789]* or OA 10-6[0123][0123456789][0123456789]* or OA 10-64[012345678][0123456789]* or OA 10-649[0123456789]*