a-be aaaa aaab aaad aaae aaar aaav aaba aabb aabd aada aade aaea aaev aara aard aare aava abaa abab abad abae abar abb- abba abbb abbe abbr abda abed abee aber abra abva abvd adaa adab adad adae adar adba adda addd adde addr adea adeb adee ader adra adre advb aede aeer aer- aera aerd aeva arab arad arae arar arba arbe arda arde area ared aree arev arr- arra arre arrr arva arve avab avar avda avea aver avra avre avva baaa baad baar baba babb babe babr bada badb badd bade badr baed baer bar- bara barb bard bare barr bava bave bbad bbbb bbdd bbeb bd-r bdav bead bear beav beba bebb bebe beda bede beeb beed beer bera berd bere berr brab brad brae brav brda brea breb bred bree brer brev brrr daab daad daae daar daba dabb dada dade daeb daer dara darb dard dare darr dava dave dbar dddd ddre dead deae dear deba debe deda dedd dede deeb deed deer deev der- dera derb dere derr derv deva deve draa drab drad drar drba drda drea dred dree drev drra dvar dvda dvdr dvra eaba eada eadb eadd eara earb eard eare eave ebba ebbr ebed eber edad edar edda edde ede- edea eder edra edve eede eeea eeee eera eeva erad erba erbb erbe erda erde ereb ered erer erev erra erre erve evae evar evdb evea ever evra evre raab raad raba rabb rabe rada radd rade radr raed raer rara rarb rare rava rave rbbb rbbr rder rdev rea- read reae rear reba rebb rebe reda redd rede redr reeb reed reev rera rerd rere reva revd reve rrad rred rrrr rved rver vaad vaar vada vade vara vard vare varr vava vder vdre vear veba veda vede veer ver- vera verb verd vere veve vrav vrba vred vver vvvv