a-be aaaa aaab aaad aaae aaar aaba aabb aabd aabt aada aade aadt aaea aara aard aare aart aata aatt abaa abab abad abae abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abra abta adaa adab adad adae adar adat adba adda addd adde addr adea adeb adee ader adet adra adre adta aede aedt aeer aer- aera aerd aeta aetr aett arab arad arae arar arat arba arbe arda arde area ared aree aret arr- arra arre arrr arrt arta arte artr at-t ataa atab atad atae atar atat atdt atea ated atee ater atra atre atta atte attr baaa baad baar baat baba babb babe babr bada badb badd bade badr baed baer bar- bara barb bard bare barr bart bata bate batt bbad bbbb bbdd bbeb bbet bd-r bead bear beat beba bebb bebe beda bede beeb beed beer beet bera berd bere berr bert beta bete bett brab brad brae brat brda brdt brea breb bred bree brer bret brrr btaa btdt btrt bttb daab daad daae daar daba dabb dabt dada dade daeb daer dara darb dard dare darr dart data date datr datt dbar dbtt dddd ddre dead deae dear deba debe debt deda dedd dede deeb deed deer deet der- dera derb dere derr deta dete detr draa drab drad drar drat drba drda drea dred dree dret drra dtaa dted eaba eada eadb eadd eara earb eard eare eart eata eate ebba ebbr ebed eber edad edar edda edde ede- edea eder edra edta eede eeea eeee eera eeta eete erad erat erba erbb erbe erda erde ereb ered erer eret erra erre erta etat etbr etee eter etra etre etta ette raab raad raat raba rabb rabe rada radd rade radr radt raed raer rara rarb rare rata rate ratt rbbb rbbr rder rea- read reae rear reat reba rebb rebe reda redd rede redr reeb reed reet rera rerd rere rert reta retd rete retr rett rrad rrat rred rrrr rtdt rtee taa- taar taat taba tabb tabe tada tade taer tara tarb tard tare tarr tart tata tatb tate tatr tatt tbar tbrb tbta tddb tdra tead tear teat teba teda tedd tede teed teer teet ter- tera tere terr teta tete tetr tett traa trab trad trae trat tre- trea tred tree tret trra trte trtr ttab ttbb tter tttt