-er a-a a-b a-t aaa aab aae aaf aam aar aat ab- aba abb abe abf abm abr abt aea aeb aee aef aem aer aet af- afa afb afe aff afm afr aft ama amb ame amf amm amr amt ar- ara arb are arf arm arr art at- ata atb ate atf atm atr att baa bab bae baf bam bar bat bba bbb bbe bbf bbm bbr bbt be- bea beb bee bef bem ber bet bfa bfb bfe bff bfm bfr bft bma bmb bme bmf bmm bmr bmt bra brb bre brf brm brr brt bta btb bte btf btm btr btt eaa eab eae eaf eam ear eat eba ebb ebe ebf ebm ebr ebt eea eeb eee eef eem eer eet ef- efa efb efe eff efm efr eft em- ema emb eme emf emm emr emt era erb ere erf erm err ert eta etb ete etf etm etr ett faa fab fae faf fam far fat fba fbb fbe fbf fbm fbr fbt fea feb fee fef fem fer fet ffa ffe fff ffm ffr fft fma fmb fme fmf fmm fmr fmt fra frb fre frf frm frr frt fta ftb fte ftf ftm ftr ftt m-f m-r maa mab mae maf mam mar mat mba mbb mbe mbf mbm mbr mbt mea meb mee mef mem mer met mfa mfb mfe mff mfm mfr mft mma mmb mme mmf mmm mmr mmt mra mrb mre mrf mrm mrr mrt mta mtb mte mtf mtm mtr mtt ra- raa rab rae raf ram rar rat rba rbb rbe rbf rbm rbr rbt re- rea reb ree ref rem rer ret rfa rfb rfe rff rfm rfr rft rma rmb rme rmf rmm rmr rmt rra rrb rrf rrm rrr rrt rta rtb rte rtf rtm rtr rtt taa tab tae taf tam tar tat tba tbb tbe tbf tbm tbr tbt te- tea teb tee tef tem ter tet tfa tfb tfe tff tfm tfr tft tma tmb tme tmf tmm tmr tmt tra trb tre trf trm trr trt tta ttb tte ttf ttm ttr ttt

a-be aaaa aaab aaae aaaf aaam aaar aaba aabb aabm aabt aaea aaem aafa aafb aaff aama aamb aame aamr aara aare aarm aart aata aatf aatt abaa abab abae abaf abam abar abat abb- abba abbb abbe abbr abbt abee aber abet abff abma abmb abmt abra abta aeaf aeer aemt aer- aera aeta aetf aetr aett afaa afam afar afat afee afer afet affa afft afma afr- afra afre afrm afta afte amaa amae amam amar amat amb- amba ambe ambr amee amer amet amfm amfr amm- amma amme amra amta amte arab arae araf aram arar arat arba arbe area aree aref arem aret arfa arfb arff arft arma arme armm armt arr- arra arre arrr arrt arta arte artr at-t ataa atab atae atar atat atea atee atef atem ater atfb atfe atm- atma atme atra atre atrm atta atte attr baaa baaf baam baar baat baba babb babe babm babr baer baff baft bama bamb bame bamf bamm bar- bara barb bare barf barm barr bart bata bate batf batt bbbb bbeb bbet beaf beam bear beat beba bebb bebe beeb beef beem beer beet befa befe beff beft bema beme bera bere berm berr bert beta bete bett bfme bfta bftt bmaa brab brae braf bram brat brea breb bree bref brem brer bret brfm brrm brrr btaa btaf btrt bttb eaaf eaba eafb eama eame eara earb eare eart eata eate ebam ebba ebbr eber eeea eeee eefa eefe eera eeta eete efab efbr efet effa efma eft- efta emae emam emar emba embe embr emer emet emma emme emra emre emta emte eraf eram erat erba erbb erbe ereb erem erer eret erft erma erme erra erre erta etam etat etbr etee etem eter etfa etfb etfe etra etre etrm etta ette faaa faam faba fabe fabm faeb faem fafa fafe faff fama fame fara farb fare farm farr fart fata fate fatf fatt fbar feaf feam fear feat feba feeb feem feer feet fefe feff fema femb feme femm fera ferb fere ferm ferr fert feta fete fetr fett ffar ffee ffff ffrr fftf fmea frab frae fram frat frea free frem fret frta ftam ftea fter maaa maaf maam maar maat maba mabe maee maem maer mafa mafb maff mama mame mamf mar- mara mare marf marm marr mart mata mate matr matt mbam mbba mbta mear meat mebe meef meem meer meet mefe meff mema meme memr mer- mera merb mere merf merm mert met- meta mete mett mfbm mffa mftf mmaa mmab mmar mmea mmff mmmm mmrf mrbb mrbm mreb mree mrta mrtm mrtt mtaa mtab mtff mtre mtrr mttr raab raaf raam raat raba rabb rabe raef raer rafa rafe raff raft rama ramb rame ramm rara rarb rare rarf rata rate ratf ratt rbaf rbbb rbbr rea- reae reaf ream rear reat reba rebb rebe reeb reef reem reet refe reff refr reft rema reme rera rere rert reta rete retr rett rfae rfam rfef rfem rmaf rrat rrrr rtbf rtee rtfb rtfm taa- taaf taar taat taba tabb tabe taem taer tafa tafe taff taft tama tame tamm tara tarb tare tarf tarm tarr tart tata tatb tate tatr tatt tbaf tbar tbrb tbta team tear teat teba teef teem teer teet teff teft tema teme ter- tera tere terf term terr teta tete tetr tett tfae tfam tfeb tmaa tmbr tmtt traa trab trae traf tram trat tre- trea tree tref trem tret trfm trfr trma trmb trra trte trtr ttab ttbb tter ttfa ttff ttma tttt

-aaa- -tree a-ram aaaam aaaee aaata aabaa aabba aabra aabtm aaeaf aafat aamer aamra aaram aarma aatma abaab ababa ababe abaer abaft abara abare abate abbar abbat abbet abeam abear abeat abeba abebe abeer abeet abera abere aberr abert abfab abram abrar abtaa abtaf abtar aeaea aebbe aetat aeter afame