-ene bbbb bbdd bbeb bcbc bccc bcde bcec bcnu bcuc bdbc bddc bebb bebe becu bede bedu beeb beed been bend bene benn benu bubb bube bubu bucc buce bucu budb budd bude budu buen bueu bunb bund bune bunn bunu c-cd cbbc cbcc cbce cbcn cbcu cbdb cbdc cbdn cbec cbee cbnd ccbc ccbn cccb cccc cccu ccdc ccdn cced ccee ccnb ccnc ccne ccnu ccuc cd-e cddb cdec cdnb cdnc cebu cec- cece cedd cede cedu ceeb ceec cen- cend cene cnbc cndd cub- cubb cube cucc cuce cucn cude cued cund cune dbcc dcbc dccb dccc dccu dcdb dddd ddub debe debu dec- decc decd dece dedd dede dedu deeb deed deen dene denn denu deue dnce dub- dubb dubc dube dubu duce dudd dude dudu dunc dune dunn ebbc ebcc ebed eben ecbc ecbe eccb eccc ecce ecdc eced ecne eddc edde ede- eden educ edun eede eedu eeee eend enb- enbn ence end- ende endu ened enee ennc enne ennu enue eubc eucd eude nbbc nbcc ncbc nccc nccn nccu ncdc ncdn ncdu ncec nced ncee ncen ncnc ncnd ncue ndcc nddb ndde nebb nebe nebn nebu necc nece nedc nedd nede nedu neeb need neen nend nene nenu neuc neue neun neuu nndb nnnn nubc nube nuce nucu nudc nudd nude nuee nunc nune nunn ubbe ubud ucbc ucdc ucdd udbc uden udun uend unbd unbe uncc unce unde uneb unec uned unee unen unne uuen uuuu