-er a-a a-b a-t aaa aab aae aaf aag aar aat ab- aba abb abe abf abg abr abt aea aeb aee aef aeg aer aet af- afa afb afe aff afg afr aft ag- aga agb age agf agg agr agt ar- ara arb are arf arg arr art at- ata atb ate atf atg atr att baa bab bae baf bag bar bat bba bbb bbe bbf bbg bbr bbt be- bea beb bee bef beg ber bet bfa bfb bfe bff bfg bfr bft bga bgb bge bgf bgg bgr bgt bra brb bre brf brg brr brt bta btb bte btf btg btr btt eaa eab eae eaf eag ear eat eba ebb ebe ebf ebg ebr ebt eea eeb eee eef eeg eer eet ef- efa efb efe eff efg efr eft ega egb ege egf egg egr egt era erb ere erf erg err ert eta etb ete etf etg etr ett faa fab fae faf fag far fat fba fbb fbe fbf fbg fbr fbt fea feb fee fef feg fer fet ffa ffe fff ffg ffr fft fga fgb fge fgf fgg fgr fgt fra frb fre frf frg frr frt fta ftb fte ftf ftg ftr ftt gaa gab gae gaf gag gar gat gba gbe gbf gbg gbr gbt ge- gea geb gee gef geg ger get gfa gfb gfe gff gfr gft gga ggb ggg ggr ggt gra grb gre grf grg grr grt gta gtb gte gtf gtg gtr gtt ra- raa rab rae raf rag rar rat rba rbb rbe rbf rbg rbr rbt re- rea reb ree ref reg rer ret rfa rfb rfe rff rfg rfr rft rga rgb rge rgf rgg rgr rgt rra rrb rrf rrg rrr rrt rta rtb rte rtf rtg rtr rtt taa tab tae taf tag tar tat tba tbb tbe tbf tbg tbr tbt te- tea teb tee tef teg ter tet tfa tfb tfe tff tfg tfr tft tga tgb tge tgf tgg tgr tgt tra trb tre trf trg trr trt tta ttb tte ttf ttg ttr ttt

a-be aaaa aaab aaae aaaf aaar aaba aabb aabt aaea aafa aafb aaff aage aara aare aart aata aatf aatt abaa abab abae abaf abag abar abat abb- abba abbb abbe abbr abbt abee aber abet abff abra abta aeaf aeer aega aer- aera aeta aetf aetr aett afaa afar afat afee afer afet affa afft afgf afr- afra afre afta afte agag agar agat agba agea agee ager aget agfa agga agge agra agre agta agte agtr arab arae araf arag arar arat arba arbe area aree aref areg aret arfa arfb arff arft arga argb arge arr- arra arre arrg arrr arrt arta arte artr at-t ataa atab atae atar atat atea atee atef ater atfb atfe atra atre atta atte attr baaa baaf baar baat baba babb babe babr baer baff baft baga bage bagg bagt bar- bara barb bare barf barg barr bart bata bate batf batt bbbb bbeb bbet bbga bbrg beaf beag bear beat beba bebb bebe beeb beef beeg beer beet befa befe beff beft bega begg bera bere berg berr bert beta bete bett bfgf bfta bftt brab brae braf brag brat brea breb bree bref breg brer bret brrr btaa btaf btrt bttb eaaf eaba eafb eaga eage eara earb eare eart eata eate ebba ebbr eber eeea eeee eefa eefe eega eera eerg eeta eete ef-g efab efbr efet effa eft- efta egaa egae egar egat egba egbe egea egee eger egfr eggb egge egra egre egta egte eraf erat erba erbb erbe ereb erer eret erft erg- erga ergg erra erre erta etag etat etbr etee eter etfa etfb etfe etra etre etta ette faaa faba fabe faeb fafa fafe faff fafg fage fagg fara farb fare farg farr fart fata fate fatf fatt fbar feaf fear feat feba feeb feer feet fefe feff fege fegg fera ferb fere ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf frab frae frag frat frea free fret frta ftea fter gaar gaba gabb gabe gabr gabt gaea gaer gafa gafb gaff gaft gaga gage gagg gara garb gare garf garg garr gart gata gate gatr gatt gbag geab gear geat geba gebe geer geet gefe geft gege gegg gera gerb gere gert geta getb gete getg gett gfer gffa ggbt ggfg gggg grab grae graf grat grbr grea greb gree gref greg gret grfa grrr gtaa gtbr gtea gtta raab raaf raag raat raba rabb rabe raef raeg raer rafa rafe raff raft raga rage ragg rara rarb rare rarf rata rate ratf ratt rbaf rbbb rbbr rea- reae reaf rear reat reba rebb rebe reeb reef reet refe reff refg refr reft rega rege regr regt rera rere rerg rert reta rete retr rett rfae rfef rgba rgbe rgtr rrat rrrr rtbf rtee rtfb taa- taaf taag taar taat taba tabb tabe taer tafa tafe taff taft taga tage tagg tara tarb tare tarf targ tarr tart tata tatb tate tatr tatt tbaf tbar tbrb tbta tear teat teba teef teer teet teff teft tega tegg tegt ter- tera tere terf terr teta tete tetr tett tfae tfeb tgfa traa trab trae traf trag trat tre- trea tree tref treg tret trfr trge trra trte trtr ttab ttbb tter ttfa ttff tttt

-aaa- -tree a-get aaaee aaarg aaata aabaa aabba aabga aabra aaeaf aafat abaab ababa ababe abaer abaft abaga abara abare abate abbar abbat abbet abear abeat abeba abebe abeer abeet abega abege abegg abera abere aberg aberr abert abfab abgar abrar abtaa abtaf abtar aeaea aebbe aegae aegea aeger aetat aeter afara afare afate afear afefe afega afere affer afgar afree afret aftab aftar after aftra aftre agafa agara agata agate agege agete aggag aggar aggat agger agree agter ar-ab araat arab- araba arabe araea araft arage arara arare arata arate arbab arbar arbat arbee arber arbet arbre areae arear areat areef areet arega