-er a-a a-b a-t aaa aab aad aae aaf aar aat aau ab- aba abb abd abe abf abr abt abu ad- ada adb add ade adf adr adt adu aea aeb aed aee aef aer aet aeu af- afa afb afd afe aff afr aft afu ar- ara arb ard are arf arr art aru at- ata atb atd ate atf atr att atu au- aua aub aud aue auf aur aut b-u baa bab bad bae baf bar bat bau bba bbb bbd bbe bbf bbr bbt bbu bda bdb bdd bde bdf bdr bdt bdu be- bea beb bed bee bef ber bet beu bfa bfb bfd bfe bff bfr bft bfu bra brb brd bre brf brr brt bru bta btb btd bte btf btr btt btu bua bub bud bue buf bur but buu daa dab dad dae daf dar dat dau dba dbb dbd dbe dbf dbr dbt dbu dda ddb ddd dde ddf ddr ddt ddu de- dea deb ded dee def der det deu dfa dfb dfd dfe dff dfr dft dfu dra drb drd dre drr drt dru dta dtb dtd dte dtf dtr dtt dtu dua dub dud due duf dur dut eaa eab ead eae eaf ear eat eau eba ebb ebd ebe ebf ebr ebt ebu ed- eda edb edd ede edf edr edt edu eea eeb eed eee eef eer eet ef- efa efb efd efe eff efr eft era erb erd ere erf err ert eru eta etb etd ete etf etr ett etu eu- eua eub eud eue euf eur eut faa fab fad fae faf far fat fau fba fbb fbd fbe fbf fbr fbt fbu fda fdb fdd fde fdf fdr fdt fdu fea feb fed fee fef fer fet feu ffa ffd ffe fff ffr fft ffu fra frb frd fre frf frr frt fru fta ftb ftd fte ftf ftr ftt ftu fua fub fud fue fuf fur fut fuu ra- raa rab rad rae raf rar rat rau rba rbb rbd rbe rbf rbr rbt rbu rda rdb rdd rde rdf rdr rdt rdu re- rea reb red ree ref rer ret reu rfa rfb rfd rfe rff rfr rft rfu rra rrb rrd rrf rrr rrt rru rta rtb rtd rte rtf rtr rtt rtu rua rub rud rue ruf rur rut ruu taa tab tad tae taf tar tat tau tba tbb tbd tbe tbf tbr tbt tbu tda tdb tdd tde tdf tdr tdt tdu te- tea teb ted tee tef ter tet teu tfa tfb tfd tfe tff tfr tft tfu tra trb trd tre trf trr trt tru tta ttb ttd tte ttf ttr ttt ttu tua tub tud tue tuf tur tut tuu ua- uaa uab uad uae uaf uar uat uau uba ubb ube ubf ubr ubt ubu uda udb udd ude udf udr udt udu uea ueb ued uee uef uer uet ufa ufd ufe uff ufr uft ufu ur- ura urb urd ure urf urr urt uru uta utb utd ute utf utr utt utu uua uue uur uut uuu

a-be a-fu aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aadu aaea aafa aafb aafd aaff aara aard aare aart aaru aata aatf aatt abaa abab abad abae abaf abar abat abau abb- abba abbb abbe abbr abbt abda abdu abed abee aber abet abff abra abta abtu abua abud abue abuf abut adaa adab adad adae adar adat adba adda addd adde addr addu adea adeb adee ader adet adfa adra adre adta adua adub adue adur aeaf aede aedt aeer aer- aera aerd aeta aetf aetr aett afaa afad afar afat afdb afee afer afet affa afft afr- afra afre afru afta afte afua afud afue arab arad arae araf arar arat arau arba arbe arda arde ardf ardu area ared aree aref aret areu arfa arfb arff arft arfu 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 atef ater atfb atfe atra atre atru atta atte attr attu atua atub atur auaa aube aude auer aufe aur- aura aurd aure aut- aute baaa baad baaf baar baat baba babb babe babr babu bada badb badd bade badr badu baed baer baff baft bar- bara barb bard bare barf barr bart baru bata bate batf batt batu bau- baud bauf baur bbad bbau bbbb bbdd bbeb bbet bd-r bduf bead beaf bear beat beau beba bebb bebe beda bede bedu beeb beed beef beer beet befa befe beff beft bera berd bere berr bert beru beta bete bett betu beur bfta bftt brab brad brae braf brat brau brda brdt brea breb bred bree bref brer bret brfu brrr brud brue brut btaa btaf btdt btrt bttb buad buar buat buba bubb bube bubu buda budb budd bude budu buea buer bueu bufe buff bufr 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 dafa dafe daff daft dara darb dard dare darf darr dart daru data date datr datt datu daub daud daue daur daut dbar dbtt dddd ddre ddub dead deae deaf dear deau deba debe debt debu deda dedd dede dedu deeb deed deef deer deet defe deff deft der- dera derb dere derf derr deta dete detr deua deue deur deut dfaf dfdt dfer dffa dfrf dftr draa drab drad draf drar drat drau drba drda drea dred dree dref 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 duff dufu dura dure durt duru duta dute duur duut eaaf eaba eada eadb eadd eafb eara earb eard eare eart eata eate ebba ebbr ebed eber ebru ebur edad edar edda edde ede- edea eder edfa edfu edra edru