a-be aaaa aaab aaae aaar aaba aabb aabt aaea aara aare aart aata aatt abaa abab abae abaj abar abat abb- abba abbb abbe abbr abbt abee aber abet abra abta aeer aer- aera aeta aetr aett ajab ajar ajat ajba ajee ajet arab arae arar arat arba arbe area aree aret arja arje arr- arra arre arrr arrt arta arte artr at-t ataa atab atae atar atat atea atee ater atra atre atta atte attr baaa baar baat baba babb babe babr baer baja bar- bara barb bare barr bart bata bate batt bbbb bbeb bbet bear beat beba bebb bebe beeb beej beer beet beja bera bere berr bert beta bete bett brab brae braj brat brea breb bree brer bret brje brrr btaa btrt bttb eaba eara earb eare eart eata eate ebba ebbr eber eeea eeee eera eeta eete ejer erat erba erbb erbe ereb erer eret erja erra erre erta etat etbr etee eter etra etre etta ette jaar jaba jabr jaer jaja jara jare jarr jart jbaa jbar jear jeat jebb jebe jeer jeet jera jere jert jeta jetb jete jett jjar jrbr jtar raab raaj raat raba rabb rabe raer raja raje rara rarb rare rata rate ratt rbbb rbbr rea- reae rear reat reba rebb rebe reeb reet reja rera rere rert reta rete retr rett rrat rrrr rtee taa- taar taat taba tabb tabe taer tara tarb tare tarr tart tata tatb tate tatr tatt tbar tbrb tbta tear teat teba teej teer teet teja ter- tera tere terj terr teta tete tetr tett traa trab trae trat tre- trea tree tret trra trte trtr ttab ttbb tter tttt