-er a-a a-b a-t aaa aab aad aae aaf aar aat ab- aba abb abd abe abf abr abt ad- ada adb add ade adf adr adt aea aeb aed aee aef aer aet af- afa afb afd afe aff afr aft ar- ara arb ard are arf arr art at- ata atb atd ate atf atr att baa bab bad bae baf bar bat bba bbb bbd bbe bbf bbr bbt bda bdb bdd bde bdf bdr bdt be- bea beb bed bee bef ber bet bfa bfb bfd bfe bff bfr bft bra brb brd bre brf brr brt bta btb btd bte btf btr btt daa dab dad dae daf dar dat dba dbb dbd dbe dbf dbr dbt dda ddb ddd dde ddf ddr ddt de- dea deb ded dee def der det dfa dfb dfd dfe dff dfr dft dra drb drd dre drr drt dta dtb dtd dte dtf dtr dtt eaa eab ead eae eaf ear eat eba ebb ebd ebe ebf ebr ebt ed- eda edb edd ede edf edr edt eea eeb eed eee eef eer eet ef- efa efb efd efe eff efr eft era erb erd ere erf err ert eta etb etd ete etf etr ett faa fab fad fae faf far fat fba fbb fbd fbe fbf fbr fbt fda fdb fdd fde fdf fdr fdt fea feb fed fee fef fer fet ffa ffd ffe fff ffr fft fra frb frd fre frf frr frt fta ftb ftd fte ftf ftr ftt ra- raa rab rad rae raf rar rat rba rbb rbd rbe rbf rbr rbt rda rdb rdd rde rdf rdr rdt re- rea reb red ree ref rer ret rfa rfb rfd rfe rff rfr rft rra rrb rrd rrf rrr rrt rta rtb rtd rte rtf rtr rtt taa tab tad tae taf tar tat tba tbb tbd tbe tbf tbr tbt tda tdb tdd tde tdf tdr tdt te- tea teb ted tee tef ter tet tfa tfb tfd tfe tff tfr tft tra trb trd tre trf trr trt tta ttb ttd tte ttf ttr ttt

a-be aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aaea aafa aafb aafd aaff aara aard aare aart aata aatf aatt abaa abab abad abae abaf abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abff abra abta adaa adab adad adae adar adat adba adda addd adde addr adea adeb adee ader adet adfa adra adre adta aeaf aede aedt aeer aer- aera aerd aeta aetf aetr aett afaa afad afar afat afdb afee afer afet affa afft afr- afra afre afta afte arab arad arae araf arar arat arba arbe arda arde ardf area ared aree aref aret arfa arfb arff arft arr- arra arre arrr arrt arta arte artr at-t ataa atab atad atae atar atat atdt atea ated atee atef ater atfb atfe atra atre atta atte attr baaa baad baaf baar baat baba babb babe babr bada badb badd bade badr baed baer baff baft bar- bara barb bard bare barf barr bart bata bate batf batt bbad bbbb bbdd bbeb bbet bd-r bead beaf bear beat beba bebb bebe beda bede beeb beed beef beer beet befa befe beff beft bera berd bere berr bert beta bete bett bfta bftt brab brad brae braf brat brda brdt brea breb bred bree bref brer bret brrr btaa btaf btdt btrt bttb daab daad daae daar daba dabb dabt dada dade daeb daer dafa dafe daff daft dara darb dard dare darf darr dart data date datr datt dbar dbtt dddd ddre dead deae deaf dear deba debe debt deda dedd dede deeb deed deef deer deet defe deff deft der- dera derb dere derf derr deta dete detr dfaf dfdt dfer dffa dfrf dftr draa drab drad draf drar drat drba drda drea dred dree dref dret drra dtaa dted eaaf eaba eada eadb eadd eafb eara earb eard eare eart eata eate ebba ebbr ebed eber edad edar edda edde ede- edea eder edfa edra edta eede eeea eeee eefa eefe eera eeta eete efab efbr efda efet effa eft- efta erad eraf erat erba erbb erbe erda erde erdf ereb ered erer eret erft erra erre erta etat etbr etee eter etfa etfb etfe etra etre etta ette faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fara farb fard fare farr fart fata fate fatf fatt fbar fead feaf fear feat feba feda fede feeb feed feer feet fefe feff fera ferb ferd fere ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf frab frad frae frat frea fred free fret frta ftea fter raab raad raaf raat raba rabb rabe rada radd rade radr radt raed raef raer rafa rafe raff raft rara rarb rare rarf rata rate ratf ratt rbaf rbbb rbbr rder rdfa rea- read reae reaf rear reat reba rebb rebe reda redd rede redr reeb reed reef reet refd refe reff refr reft rera rerd rere rert reta retd rete retr rett rfae rfef rrad rrat rred rrrr rtbf rtdt rtee rtfb taa- taaf taar taat taba tabb tabe tada tade taer tafa tafe taff taft tara tarb tard tare tarf tarr tart tata tatb tate tatr tatt tbaf tbar tbrb tbta tddb tdff tdra tead tear teat teba teda tedd tede teed teef teer teet teff teft ter- tera tere terf terr teta tete tetr tett tfae tfeb traa trab trad trae traf trat tre- trea tred tree tref tret trfd trfr trra trte trtr ttab ttbb tter ttfa ttff tttt

-aaa- -abad -tree aaaee aaata aabaa aabba aabra aadat aaeaf aafat abaab ababa ababe abada abade abaer abaft abara abare abate abbad abbar abbat abbed abbet abdet abead abear abeat abeba abebe abede abeed abeer abeet abera abere aberr abert abfab abrad abrar abtaa abtaf abtar adaba adabe adada adara adare adata adate adber addae