-er a-a a-b a-t aaa aab aae aaf aag aao aar aat ab- aba abb abe abf abg abo abr abt aea aeb aee aef aeg aeo aer aet af- afa afb afe aff afg afo afr aft ag- aga agb age agf agg ago agr agt aoa aob aoe aof aog aoo aor aot ar- ara arb are arf arg aro arr art at- ata atb ate atf atg ato atr att baa bab bae baf bag bao bar bat bba bbb bbe bbf bbg bbo bbr bbt be- bea beb bee bef beg beo ber bet bfa bfb bfe bff bfg bfo bfr bft bga bgb bge bgf bgg bgo bgr bgt boa bob boe bof bog boo bor bot bra brb bre brf brg bro brr brt bta btb bte btf btg bto btr btt eaa eab eae eaf eag eao ear eat eba ebb ebe ebf ebg ebo ebr ebt eea eeb eee eef eeg eeo eer eet ef- efa efb efe eff efg efo efr eft ega egb ege egf egg ego egr egt eo- eoa eob eoe eof eog eoo eor eot era erb ere erf erg ero err ert eta etb ete etf etg eto etr ett faa fab fae faf fag fao far fat fba fbb fbe fbf fbg fbo fbr fbt fea feb fee fef feg feo fer fet ffa ffe fff ffg ffo ffr fft fga fgb fge fgf fgg fgr fgt foa fob foe fof fog foo for fot fra frb fre frf frg fro frr frt fta ftb fte ftf ftg fto ftr ftt gaa gab gae gaf gag gao gar gat gba gbe gbf gbg gbo gbr gbt ge- gea geb gee gef geg geo ger get gfa gfb gfe gff gfo gfr gft gga ggb ggg ggo ggr ggt goa gob goe gof gog goo gor got gra grb gre grf grg gro grr grt gta gtb gte gtf gtg gto gtr gtt oaa oab oae oaf oag oao oar oat ob- oba obb obe obf obg obo obr obt oea oeb oee oef oeg oeo oer oet of- ofa ofb ofe off ofg ofo ofr oft oga oge ogf ogg ogo ogt oo- ooa oob oof oog ooo oor oot or- ora orb ore orf org oro orr ort ot- ota otb ote otf otg oto otr ott ra- raa rab rae raf rag rao rar rat rba rbb rbe rbf rbg rbo rbr rbt re- rea reb ree ref reg reo rer ret rfa rfb rfe rff rfg rfo rfr rft rga rgb rge rgf rgg rgo rgr rgt roa rob roe rof rog roo ror rot rra rrb rrf rrg rrr rrt rta rtb rte rtf rtg rto rtr rtt taa tab tae taf tag tao tar tat tba tbb tbe tbf tbg tbo tbr tbt te- tea teb tee tef teg teo ter tet tfa tfb tfe tff tfg tfo tfr tft tga tgb tge tgf tgg tgo tgr tgt to- toa tob toe tof tog too tor tot tra trb tre trf trg tro trr trt tta ttb tte ttf ttg tto ttr ttt

a-be aaaa aaab aaae aaaf aaar aaba aabb aabt aaea aafa aafb aaff aage aaoe aaoo aara aare aaro aart aata aatf aatt abaa abab abae abaf abag abar abat abb- abba abbb abbe abbo abbr abbt abee aber abet abff aboa abob abof aboo abor abot abra abro abta aeaf aeer aega aer- aera aero aeta aetf aeto aetr aett afaa afao afar afat afee afer afet affa affo afft afgf afoa afoe afog afoo afor afr- afra afre afro afta afte ag-o agag agao agar agat agba agbo agea agee ager aget agfa agga agge agob agog agoo agot agra agre agro agta agte agtr aoba aora aorb aort aotf arab arae araf arag arar arat arba arbe area aree aref areg areo aret arfa arfb arff arft arga argb arge argo aroa arob aroe aroo aror arr- arra arre arrg arro arrr arrt arta arte arto artr at-t ataa atab atae atar atat atea atee atef ateo ater atfb atfe atgo atob atoe atof ator atot atra atre atro atta atte atto attr baaa baaf baar baat baba babb babe babo babr baer baff bafo baft baga bage bagg bago bagt bar- bara barb bare barf barg baro barr bart bata bate batf bato batt bbbb bbeb bbet bbga bbrg beaf beag bear beat beba bebb bebe bebo beeb beef beeg beer beet befa befe beff befo beft bega begg bego beo- beof beor beot bera bere berg bero berr bert beta bete beto bett bfgf bfta bftt boab boag boar boat boba bobb bobe bobo boea boee boef boeo boer boet bofa bofe boff boga boge bogg bogo bogt boob booe boof boog boor boot bor- bora bore borf borg boro borr bort bota botb bote boto bott brab brae braf brag brao brat brea breb bree bref breg breo brer bret broa brob broe brog broo bror brot brrr btaa btaf btob btor btrt bttb eaaf eaba eafb eaga eage eara earb eare earo eart eata eate ebba ebbo ebbr eber eboe eboo ebor ebro eeea eeee eefa eefe eega eera eerg eero eeta eete ef-g efab efbr efeo efet effa efor eft- efta egaa egae egao egar egat egba egbe egea egee eger egfr eggb egge eggo ego- egor egot egra egre egta egte eora eore eota eoto eraf erat erba erbb erbe ereb erer eret erft erg- erga ergg ergo erob eroe eroo erra erre erro erta etag etat etbr etee eter etfa etfb etfe etoe etra etre etro etta ette etto faaa faba fabe fabo faeb fafa fafe faff fafg fafo fage fagg fago fara farb fare farg faro farr fart fata fate fatf fato fatt fbar feaf fear feat feba febo feeb feer feet fefe feff fefo fege fegg feof fera ferb fere fero ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf foaf foar foba