-er a-a a-b a-t aaa aab aad aae aar aat aau ab- aba abb abd abe abr abt abu ad- ada adb add ade adr adt adu aea aeb aed aee aer aet aeu ar- ara arb ard are arr art aru at- ata atb atd ate atr att atu au- aua aub aud aue aur aut b-u baa bab bad bae bar bat bau bba bbb bbd bbe bbr bbt bbu bda bdb bdd bde bdr bdt bdu be- bea beb bed bee ber bet beu bra brb brd bre brr brt bru bta btb btd bte btr btt btu bua bub bud bue bur but buu daa dab dad dae dar dat dau dba dbb dbd dbe dbr dbt dbu dda ddb ddd dde ddr ddt ddu de- dea deb ded dee der det deu dra drb drd dre drr drt dru dta dtb dtd dte dtr dtt dtu dua dub dud due dur dut eaa eab ead eae ear eat eau eba ebb ebd ebe ebr ebt ebu ed- eda edb edd ede edr edt edu eea eeb eed eee eer eet era erb erd ere err ert eru eta etb etd ete etr ett etu eu- eua eub eud eue eur eut ra- raa rab rad rae rar rat rau rba rbb rbd rbe rbr rbt rbu rda rdb rdd rde rdr rdt rdu re- rea reb red ree rer ret reu rra rrb rrd rrr rrt rru rta rtb rtd rte rtr rtt rtu rua rub rud rue rur rut ruu taa tab tad tae tar tat tau tba tbb tbd tbe tbr tbt tbu tda tdb tdd tde tdr tdt tdu te- tea teb ted tee ter tet teu tra trb trd tre trr trt tru tta ttb ttd tte ttr ttt ttu tua tub tud tue tur tut tuu ua- uaa uab uad uae uar uat uau uba ubb ube ubr ubt ubu uda udb udd ude udr udt udu uea ueb ued uee uer uet ur- ura urb urd ure urr urt uru uta utb utd ute utr utt utu uua uue uur uut uuu

a-be aaaa aaab aaad aaae aaar aaba aabb aabd aabt aada aade aadt aadu aaea aara aard aare aart aaru aata aatt abaa abab abad abae abar abat abau abb- abba abbb abbe abbr abbt abda abdu abed abee aber abet abra abta abtu abua abud abue abut adaa adab adad adae adar adat adba adda addd adde addr addu adea adeb adee ader adet adra adre adta adua adub adue adur aede aedt aeer aer- aera aerd aeta aetr aett arab arad arae arar arat arau arba arbe arda arde ardu area ared aree aret areu arr- arra arre arrr arrt arru arta arte artr arua arub arud arue arut at-t ataa atab atad atae atar atat atdt atea ated atee ater atra atre atru atta atte attr attu atua atub atur auaa aube aude auer aur- aura aurd aure aut- aute baaa baad baar baat baba babb babe babr babu bada badb badd bade badr badu baed baer bar- bara barb bard bare barr bart baru bata bate batt batu bau- baud baur bbad bbau bbbb bbdd bbeb bbet bd-r bead bear beat beau beba bebb bebe beda bede bedu beeb beed beer beet bera berd bere berr bert beru beta bete bett betu beur brab brad brae brat brau brda brdt brea breb bred bree brer bret brrr brud brue brut btaa btdt btrt bttb buad buar buat buba bubb bube bubu buda budb budd bude budu buea buer bueu bur- bura burb burd bure burr burt buru but- buta bute butt daab daad daae daar daau daba dabb dabt dabu dada dade dadu daeb daer daeu dara darb dard dare darr dart daru data date datr datt datu daub daud daue daur daut dbar dbtt dddd ddre ddub dead deae dear deau deba debe debt debu deda dedd dede dedu deeb deed deer deet der- dera derb dere derr deta dete detr deua deue deur deut draa drab drad drar drat drau drba drda drea dred dree dret drra drua drub drue drut druu dtaa dted duaa duab duad duar duat dub- duba dubb dube dubu duda dudd dude dudu duer duet dura dure durt duru duta dute duur duut eaba eada eadb eadd eara earb eard eare eart eata eate ebba ebbr ebed eber ebru ebur edad edar edda edde ede- edea eder edra edru edta edur eede eedu eeea eeee eera eeta eete eetu erad erat erau erba erbb erbe erda erde ereb ered erer eret erra erre erta ertu erua erub erur etat etbr etee eter etra etre etta ette ettu etua euba eude euer eur- eura eure eurt raab raad raat raba rabb rabe rabu rada radd rade radr radt radu raed raer rara rarb rare rata rate ratt ratu raua raub raud raue raut rbbb rbbr rder rea- read reae rear reat reau reba rebb rebe rebu reda redd rede redr redu reeb reed reet rera rerd rere rert reru reta retd rete retr rett reue reut reuu rrad rrat rred rrrr rtdt rtee ruad ruba rubb rube rubu ruda rudd rude rued ruer ruet rura rurd rure ruru ruta rute rutt rutu ruud taa- taar taat taba tabb tabe tabu tada tade taer tara tarb tard tare tarr tart taru tata tatb tate tatr tatt tatu taua taub taue taur taut tbar tbrb tbta tddb tdra tead tear teat teba tebu teda tedd tede teed teer teet ter- tera tere terr teru teta tete tetr tett tetu teut traa trab trad trae trat trau tre- trea tred tree tret treu trra trte trtr trub trud true trut truu ttab ttbb tter tttt tuae tuar tuat tuba tubb tube tubr tubu tude tudu tuer tuet tura turb turd ture turr turt turu tuta tute tutt tutu uart uaru uata uatu uaua ubar ubba ubbe uber ubet ubra ubud udaa udad udar udau udea uder udet udra ueba ueda