-er a-a a-b a-t aaa aab aae aag aar aat aau ab- aba abb abe abg abr abt abu aea aeb aee aeg aer aet aeu ag- aga agb age agg agr agt agu ar- ara arb are arg arr art aru at- ata atb ate atg atr att atu au- aua aub aue aug aur aut b-u baa bab bae bag bar bat bau bba bbb bbe bbg bbr bbt bbu be- bea beb bee beg ber bet beu bga bgb bge bgg bgr bgt bgu bra brb bre brg brr brt bru bta btb bte btg btr btt btu bua bub bue bug bur but buu eaa eab eae eag ear eat eau eba ebb ebe ebg ebr ebt ebu eea eeb eee eeg eer eet ega egb ege egg egr egt egu era erb ere erg err ert eru eta etb ete etg etr ett etu eu- eua eub eue eug eur eut gaa gab gae gag gar gat gau gba gbe gbg gbr gbt gbu ge- gea geb gee geg ger get geu gga ggb ggg ggr ggt ggu gra grb gre grg grr grt gru gta gtb gte gtg gtr gtt gtu gu- gua gub gue gug gur gut guu ra- raa rab rae rag rar rat rau rba rbb rbe rbg rbr rbt rbu re- rea reb ree reg rer ret reu rga rgb rge rgg rgr rgt rra rrb rrg rrr rrt rru rta rtb rte rtg rtr rtt rtu rua rub rue rug rur rut ruu taa tab tae tag tar tat tau tba tbb tbe tbg tbr tbt tbu te- tea teb tee teg ter tet teu tga tgb tge tgg tgr tgt tgu tra trb tre trg trr trt tru tta ttb tte ttg ttr ttt ttu tua tub tue tug tur tut tuu ua- uaa uab uae uag uar uat uau uba ubb ube ubg ubr ubt ubu uea ueb uee ueg uer uet uga ugb uge ugg ugr ugt ugu ur- ura urb ure urg urr urt uru uta utb ute utr utt utu uua uue uug uur uut uuu

a-be aaaa aaab aaae aaar aaba aabb aabt aaea aage aara aare aart aaru aata aatt abaa abab abae abag abar abat abau abb- abba abbb abbe abbr abbt abee aber abet abra abta abtu abua abue abug abut aeer aega aer- aera aeta aetr aett agag agar agat agau agba agea agee ager aget agga agge aggu agra agre agta agte agtr agua ague agur agut arab arae arag arar arat arau arba arbe area aree areg aret areu arga argb arge arr- arra arre arrg arrr arrt arru arta arte artr arua arub arue arug arut at-t ataa atab atae atar atat atea atee ater atra atre atru atta atte attr attu atua atub atug atur auaa aube auer auga auge aur- aura aure aut- aute auug baaa baar baat baba babb babe babr babu baer baga bage bagg bagt bar- bara barb bare barg barr bart baru bata bate batt batu bau- baug baur bbau bbbb bbeb bbet bbga bbrg beag bear beat beau beba bebb bebe beeb beeg beer beet bega begg begu bera bere berg berr bert beru beta bete bett betu beur brab brae brag brat brau brea breb bree breg brer bret brrr brue brug brut btaa btrt bttb buar buat buba bubb bube bubu buea buer bueu buga buge bugg bur- bura burb bure burg burr burt buru but- buta bute butt eaba eaga eage eara earb eare eart eata eate ebba ebbr eber ebru ebur eeea eeee eega eera eerg eeta eete eetu egaa egae egar egat egba egbe egbu egea egee eger eggb egge egra egre egta egte erat erau erba erbb erbe ereb erer eret erg- erga ergg erra erre erta ertu erua erub erur etag etat etbr etee eter etra etre etta ette ettu etua euba euer euge eur- eura eure eurt gaar gaba gabb gabe gabr gabt gabu gaea gaer gaga gage gagg gagu gara garb gare garg garr gart gata gate gatr gatt gaua gaub gaue gaur gaut gbag geab gear geat geba gebe geer geet gege gegg gera gerb gere gert geru geta getb gete getg gett geue ggbt gggg grab grae grat grau grbr grea greb gree greg gret greu grrr grua grub grue grug grur grut gtaa gtbr gtea gtta guaa guag guar guat guba gubb gubu guer guga gugb guge gugg gugu gura gurb gure gurg gurr gurt guru guta gute gutt gutu raab raag raat raba rabb rabe rabu raeg raer raga rage ragg ragu rara rarb rare rata rate ratt ratu raua raub raue raut rbbb rbbr rea- reae rear reat reau reba rebb rebe rebu reeb reet rega rege regr regt regu rera rere rerg rert reru reta rete retr rett reue reut reuu rgba rgbe rgtr rrat rrrr rtee ruag ruba rubb rube rubu ruer ruet ruga ruge rugg rura rure ruru ruta rute rutt rutu taa- taag taar taat taba tabb tabe tabu taer taga tage tagg tagu tara tarb tare targ tarr tart taru tata tatb tate tatr tatt tatu taua taub taue taur taut tbar tbrb tbta tear teat teba tebu teer teet tega tegg tegt tegu ter- tera tere terr teru teta tete tetr tett tetu teut traa trab trae trag trat trau tre- trea tree treg tret treu trge trra trte trtr trub true trug trut truu ttab ttbb tter tttt tuae tuar tuat tuba tubb tube tubr tubu tuer tuet tuga tugg tugu tura turb ture turg turr turt turu tuta tute tutt tutu uart uaru uata uatu uaua ubar ubba ubbe uber ubet ubra ueba ugab ugar uggt ugra ugta ugur uguu urat urau urba urbe ure- urea uret urga urge urgu urra urre urte urur urut utau uter uttu utug uuta uuuu

-aaa- -tree a-get aaaee aaarg aaata aabaa aabba aabga aabra aarau abaab ababa ababe ababu abaer abaga abara abare abaru abate abbar abbat abbet abbur abear