a-be aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aaea aara aard aare abaa abab abad abae abar abb- abba abbb abbe abbr abda abed abee aber abra adaa adab adad adae adar adba adda addd adde addr adea adeb adee ader adra adre aede aeer aer- aera aerd arab arad arae arar arba arbe arda arde area ared aree arr- arra arre arrr baaa baad baar baba babb babe babr bada badb badd bade badr baed baer bar- bara barb bard bare barr bbad bbbb bbdd bbeb bd-r bead bear beba bebb bebe beda bede beeb beed beer bera berd bere berr brab brad brae brda brea breb bred bree brer brrr daab daad daae daar daba dabb dada dade daeb daer dara darb dard dare darr dbar dddd ddre dead deae dear deba debe deda dedd dede deeb deed deer der- dera derb dere derr draa drab drad drar drba drda drea dred dree drra eaba eada eadb eadd eara earb eard eare ebba ebbr ebed eber edad edar edda edde ede- edea eder edra eede eeea eeee eera erad erba erbb erbe erda erde ereb ered erer erra erre raab raad raba rabb rabe rada radd rade radr raed raer rara rarb rare rbbb rbbr rder rea- read reae rear reba rebb rebe reda redd rede redr reeb reed rera rerd rere rrad rred rrrr