-er a-a a-b a-t aaa aab aae aaf aao aar aat aau ab- aba abb abe abf abo abr abt abu aea aeb aee aef aeo aer aet aeu af- afa afb afe aff afo afr aft afu aoa aob aoe aof aoo aor aot aou ar- ara arb are arf aro arr art aru at- ata atb ate atf ato atr att atu au- aua aub aue auf auo aur aut b-u baa bab bae baf bao bar bat bau bba bbb bbe bbf bbo bbr bbt bbu be- bea beb bee bef beo ber bet beu bfa bfb bfe bff bfo bfr bft bfu boa bob boe bof boo bor bot bou bra brb bre brf bro brr brt bru bta btb bte btf bto btr btt btu bua bub bue buf buo bur but buu eaa eab eae eaf eao ear eat eau eba ebb ebe ebf ebo ebr ebt ebu eea eeb eee eef eeo eer eet ef- efa efb efe eff efo efr eft eo- eoa eob eoe eof eoo eor eot eou era erb ere erf ero err ert eru eta etb ete etf eto etr ett etu eu- eua eub eue euf eur eut faa fab fae faf fao far fat fau fba fbb fbe fbf fbo fbr fbt fbu fea feb fee fef feo fer fet feu ffa ffe fff ffo ffr fft ffu foa fob foe fof foo for fot fou fra frb fre frf fro frr frt fru fta ftb fte ftf fto ftr ftt ftu fua fub fue fuf fuo fur fut fuu oaa oab oae oaf oao oar oat oau ob- oba obb obe obf obo obr obt obu oea oeb oee oef oeo oer oet of- ofa ofb ofe off ofo ofr oft ofu oo- ooa oob oof ooo oor oot or- ora orb ore orf oro orr ort oru ot- ota otb ote otf oto otr ott otu ou- oua oue ouf ouo our out ra- raa rab rae raf rao rar rat rau rba rbb rbe rbf rbo rbr rbt rbu re- rea reb ree ref reo rer ret reu rfa rfb rfe rff rfo rfr rft rfu roa rob roe rof roo ror rot rou rra rrb rrf rrr rrt rru rta rtb rte rtf rto rtr rtt rtu rua rub rue ruf ruo rur rut ruu taa tab tae taf tao tar tat tau tba tbb tbe tbf tbo tbr tbt tbu te- tea teb tee tef teo ter tet teu tfa tfb tfe tff tfo tfr tft tfu to- toa tob toe tof too tor tot tou tra trb tre trf tro trr trt tru tta ttb tte ttf tto ttr ttt ttu tua tub tue tuf tuo tur tut tuu ua- uaa uab uae uaf uao uar uat uau uba ubb ube ubf ubo ubr ubt ubu uea ueb uee uef uer uet ufa ufe uff ufo ufr uft ufu uoa uob uoe uoo uor uot ur- ura urb ure urf uro urr urt uru uta utb ute utf uto utr utt utu uua uue uur uut uuu

a-be a-fu aaaa aaab aaae aaaf aaar aaba aabb aabt aaea aafa aafb aaff aaoe aaoo aara aare aaro aart aaru aata aatf aatt abaa abab abae abaf abar abat abau abb- abba abbb abbe abbo abbr abbt abee aber abet abff aboa abob abof aboo abor abot abou abra abro abta abtu abua abue abuf abut aeaf aeer aer- aera aero aeta aetf aeto aetr aett afaa afao afar afat afee afer afet affa affo afft afoa afoe afoo afor afr- afra afre afro afru afta afte afua afue aoba aoeu aora aorb aort aotf aouf aout arab arae araf arar arat arau arba arbe area aree aref areo aret areu arfa arfb arff arft arfu aroa arob aroe aroo aror arr- arra arre arro arrr arrt arru arta arte arto artr arua arub arue arut at-t ataa atab atae atar atat atea atee atef ateo ater atfb atfe atob atoe atof ator atot atra atre atro atru atta atte atto attr attu atua atub atur auaa aube auer aufe aur- aura aure auro aut- aute auto baaa baaf baar baat baba babb babe babo babr babu baer baff bafo baft bar- bara barb bare barf baro barr bart baru bata bate batf bato batt batu bau- bauf baur bbau bbbb bbeb bbet beaf bear beat beau beba bebb bebe bebo beeb beef beer beet befa befe beff befo beft beo- beof beor beot bera bere bero berr bert beru beta bete beto bett betu beur bfta bftt boab boar boat boba bobb bobe bobo bobu boea boee boef boeo boer boet bofa bofe boff bofu boob booe boof boor boot bor- bora bore borf boro borr bort boru bota botb bote boto bott boua boue bouf bour bout brab brae braf brao brat brau brea breb bree bref breo brer bret brfu broa brob broe broo bror brot brou brrr brue brut btaa btaf btob btor btrt bttb buar buat buba bubb bube bubo bubu buea buer bueu bufe buff bufo bufr bur- bura burb bure buro burr burt buru but- buta bute buto butt eaaf eaba eafb eara earb eare earo eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebro ebru ebur eeea eeee eefa eefe eera eero eeta eete eetu efab efbr efeo efet effa efor eft- efta eftu efua eora eore eota eoto eraf erat erau erba erbb erbe ereb erer eret erft erob eroe eroo erra erre erro erta ertu erua erub erur etat etbr etee eter etfa etfb etfe etoe etra etre etro etta ette etto ettu etua euba euer eur- eura eure euro eurt faaa faba fabe fabo fabu faeb fafa fafe faff fafo fara farb fare faro farr fart faru fata fate fatf fato fatt faue faur faut fbar feaf fear feat feba febo feeb feer feet fefe feff fefo feof fera ferb fere fero ferr fert feru feta fete fetr fett