Manul Sorting - Order by particular Alphabets

SELECT   haou.NAME, haou.TYPE,HR.MEANING

    FROM hr_all_organization_units haou,HR_LOOKUPS HR

   WHERE TYPE IS NOT NULL

   AND HR.LOOKUP_TYPE = 'ORG_TYPE'

   AND HR.LOOKUP_CODE = HAOU.TYPE

ORDER BY CASE WHEN TYPE IN ('BG','GR','DE','SE','UN') THEN 0 ELSE 1 END ASC,TYPE ASC