-er a-a a-b a-t aaa aab aad aae aaf aak aar aat ab- aba abb abd abe abf abk abr abt ad- ada adb add ade adf adk adr adt aea aeb aed aee aef aek aer aet af- afa afb afd afe aff afk afr aft aka akb akd ake akk akr ar- ara arb ard are arf ark arr art at- ata atb atd ate atf atr att baa bab bad bae baf bak bar bat bba bbb bbd bbe bbf bbk bbr bbt bda bdb bdd bde bdf bdk bdr bdt be- bea beb bed bee bef bek ber bet bfa bfb bfd bfe bff bfr bft bka bkb bke bkf bkk bkr bkt bra brb brd bre brf brk brr brt bta btb btd bte btf btk btr btt daa dab dad dae daf dak dar dat dba dbb dbd dbe dbf dbk dbr dbt dda ddb ddd dde ddf ddk ddr ddt de- dea deb ded dee def dek der det dfa dfb dfd dfe dff dfk dfr dft dka dkb dke dkk dkr dkt dra drb drd dre drk drr drt dta dtb dtd dte dtf dtk dtr dtt eaa eab ead eae eaf eak ear eat eba ebb ebd ebe ebf ebk ebr ebt ed- eda edb edd ede edf edk edr edt eea eeb eed eee eef eek eer eet ef- efa efb efd efe eff efr eft eka ekb ekd eke ekf ekr ekt era erb erd ere erf erk err ert eta etb etd ete etf etk etr ett faa fab fad fae faf fak far fat fba fbb fbd fbe fbf fbk fbr fbt fda fdb fdd fde fdf fdk fdr fdt fea feb fed fee fef fek fer fet ffa ffd ffe fff ffk ffr fft fka fkb fkf fkk fkt fra frb frd fre frf frk frr frt fta ftb ftd fte ftf ftk ftr ftt k-t ka- kaa kab kad kae kaf kak kar kat kba kbb kbd kbe kbf kbk kbr kda kdb kde kdf kdk kdr kdt ke- kea keb ked kee kef kek ker ket kfa kfd kff kkb kke kkk kkr kkt kra krd krf krk krr krt kta ktb kte ktf ktk ktr ktt ra- raa rab rad rae raf rak rar rat rba rbb rbd rbe rbf rbk rbr rbt rda rdb rdd rde rdf rdr rdt re- rea reb red ree ref rek rer ret rfa rfb rfd rfe rff rfk rfr rft rkb rke rkf rkk rkt rra rrb rrd rrf rrk rrr rrt rta rtb rtd rte rtf rtk rtr rtt taa tab tad tae taf tak tar tat tba tbb tbd tbe tbf tbk tbr tbt tda tdb tdd tde tdf tdk tdr tdt te- tea teb ted tee tef tek ter tet tfa tfb tfd tfe tff tfk tfr tft tka tkb tke tkk tkr tkt tra trb trd tre trf trk trr trt tta ttb ttd tte ttf ttk ttr ttt

a-ak a-be aaaa aaab aaad aaae aaaf aaar aaba aabb aabd aabt aada aade aadt aaea aafa aafb aafd aaff aaka aake aara aard aare aart aata aatf aatk aatt abaa abab abad abae abaf abak abar abat abb- abba abbb abbe abbr abbt abda abed abee aber abet abff abra abta adaa adab adad adae adak adar adat adba adda addd adde addr adea adeb adee ader adet adfa adra adre adta aeaf aede aedt aeer aeka aer- aera aerd aeta aetf aetr aett afaa afad afak afar afat afdb afee afek afer afet affa afft afka afkr afr- afra afre afta afte akaa akae akar aked akee aker akka akr- akra akre akte arab arad arae araf arak arar arat arba arbe arda arde ardf area ared aree aref arek aret arfa arfb arff arft arka arke arr- arra arre arrk arrr arrt arta arte artr at-t ataa atab atad atae atak atar atat atdt atea ated atee atef ater atfb atfe atka atkt atra atre atrk atta atte attr baaa baad baaf baak baar baat baba babb babe babr bada badb badd bade badr baed baek baer baff baft bak- baka bake bakr bakt bar- bara barb bard bare barf bark barr bart bata bate batf batt bbad bbbb bbdd bbeb bbet bd-r bead beaf beak bear beat beba bebb bebe beda bede beeb beed beef beek beer beet befa befe beff beft beka beke bera berd bere berk berr bert beta bete bett bfta bftt brab brad brae braf brak brat brda brdt brea breb bred bree bref brek brer bret brka brkb brrr btaa btaf btdt btek btrt bttb daab daad daae daar daba dabb dabt dada dade daeb daer dafa dafe daff daft daka dake dara darb dard dare darf dark darr dart data date datr datt dbar dbtt dddd ddre dead deae deaf deak dear deba debe debt deda dedd dede deeb deed deef deek deer deet defe deff deft dek- deka deke der- dera derb dere derf derk derr deta dete detk detr dfaf dfdt dfer dffa dfrf dftr dkba draa drab drad draf drak drar drat drba drda drea dred dree dref drek dret drra dtaa dted dtek 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 eeka eeke eera eeta eete efab efbr efda efet effa efke eft- efta eka- ekab ekeb eked ekek eker eket ekka ekta erad eraf erat erba erbb erbe erda erde erdf ereb ered erer eret erft erke erra erre erta etak etat etbr etee eter etfa etfb etfe etka etra etre etta ette f--k faaa faad faba fabd fabe fada fadd fade faeb fafa fafe faff fake fakt fara farb fard fare fark farr fart fata fate fatf fatt fbar fead feaf feak fear feat feba feda fede feeb feed feek feer feet fefe feff feke fera ferb ferd fere ferk ferr fert feta