-er a-a a-b aaa aab aae aaf aak aar ab- aba abb abe abf abk abr aea aeb aee aef aek aer af- afa afb afe aff afk afr aka akb ake akk akr ar- ara arb are arf ark arr baa bab bae baf bak bar bba bbb bbe bbf bbk bbr be- bea beb bee bef bek ber bfa bfb bfe bff bfr bka bkb bke bkf bkk bkr bra brb bre brf brk brr eaa eab eae eaf eak ear eba ebb ebe ebf ebk ebr eea eeb eee eef eek eer ef- efa efb efe eff efr eka ekb eke ekf ekr era erb ere erf erk err faa fab fae faf fak far fba fbb fbe fbf fbk fbr fea feb fee fef fek fer ffa ffe fff ffk ffr fka fkb fkf fkk fra frb fre frf frk frr ka- kaa kab kae kaf kak kar kba kbb kbe kbf kbk kbr ke- kea keb kee kef kek ker kfa kff kkb kke kkk kkr kra krf krk krr ra- raa rab rae raf rak rar rba rbb rbe rbf rbk rbr re- rea reb ree ref rek rer rfa rfb rfe rff rfk rfr rkb rke rkf rkk rra rrb rrf rrk rrr

a-ak a-be aaaa aaab aaae aaaf aaar aaba aabb aaea aafa aafb aaff aaka aake aara aare abaa abab abae abaf abak abar abb- abba abbb abbe abbr abee aber abff abra aeaf aeer aeka aer- aera afaa afak afar afee afek afer affa afka afkr afr- afra afre akaa akae akar akee aker akka akr- akra akre arab arae araf arak arar arba arbe area aree aref arek arfa arfb arff arka arke arr- arra arre arrk arrr baaa baaf baak baar baba babb babe babr baek baer baff bak- baka bake bakr bar- bara barb bare barf bark barr bbbb bbeb beaf beak bear beba bebb bebe beeb beef beek beer befa befe beff beka beke bera bere berk berr brab brae braf brak brea breb bree bref brek brer brka brkb brrr eaaf eaba eafb eara earb eare ebba ebbr eber eeea eeee eefa eefe eeka eeke eera efab efbr effa efke eka- ekab ekeb ekek eker ekka eraf erba erbb erbe ereb erer erke erra erre f--k faaa faba fabe faeb fafa fafe faff fake fara farb fare fark farr fbar feaf feak fear feba feeb feek feer fefe feff feke fera ferb fere ferk ferr ffar ffee ffff ffrr fkab frab frae frak frea free kaaa kaab kaaf kaak kaar kaba kabb kabe kabf kabr kaer kafa kafe kaff kafr kaka kake kakk kara karb kare karf kark karr kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbf kbbk kbbr kbeb kbee kbef kbek kber kbfb kbff kbfk kbfr kbkb kbkf kbkk kbkr kbra kbrb kbre kbrf kbrk kea- keak kear keba kebb kebe kebr keef keek keer kefa kefb keff kefr keka kekb keke ker- kera kerb kere kerf kerk kerr kfab kfar kfbk kfeb kfer kffa kffb kfff kffk kfka kfkb kfra kfre kfrr kkaa kkar kkba kkbb kkbe kkbr kkea kkfr kkkk kkrb kkre kkrf kkrk kkrr krab krae krak krar krba krbb krbe krbk krbr krea kreb kree kref krek krfe krff krka krke krkk krkr krrb krre krrf krrk krrr raab raaf raak raba rabb rabe rabk raef raer rafa rafe raff raka rake rakk rara rarb rare rarf rark rbaf rbbb rbbr rea- reae reaf reak rear reba rebb rebe rebk reeb reef reek refe reff refr reka reke rera rere rfae rfef rkkf rrrr

-aaa- aaaee aabaa aabba aabra aaeaf aaker aakre abaab ababa ababe abaer abaka abake abara abare abbar abear abeba abebe abeer abekr abera abere aberr abfab abkar abrak abrar abrek aeaea aebbe afara afare afear afefe afeka afere affer afree aka-e akaba akare akbar akera akker akkra akrak akrar ar-ab arab- araba arabe araea arake arara arare arbab arbar arbee arber arbre areae arear areef areek areka areke arere arfe arkar arrak arrea b-r-k baabe baake babak babar babee babek baber babka babra baffa bafra bakar bakea baker bakka bakke bakra baraa barab barak barar barba barbe barea barek barer barff bark- barka barke barra barre bbbee bbear be-er beafe beara beare bebar bebek beber bebra beebe beeke beffe bekaa beker bekka bekke bekra berak berar berba berbe berea berek berk- berka berke berra berre braak braff brake break breba breef breek breer breke brera brere brrar brrrr eafre eaker earar ebara ebber eeeee efare efere effer effra ekker erbaa erbar erbbe erber erear erere erkak fabae faber fabra fabre faker farab farak farbe fareb farer farfa farke farre feake feare febre feere ferae ferr- ferra ferre fraba frake frakk freak frear freea freek freer freke frera frere k-rab kaaba kabaa kabab kabak kabar kabba kaber kaera kafak kafar kafer kaffa kaffe kafka kafra kakae kakar kakka kakke kakra karak karee karfe karka karre keare kebab kebar kebbe kebek keber kebra keefe keera keere kefee kera- kerar kerek kerre kraak kraar kraka krake kreef kreek kreka kreke ra-ra raaba raabe raaff rabab rabak rabba rabbe rabke raeff rafar rafer raffa raffe rakaa rakab rakee rakek raker rakke rarae raraf rareb raree rarer reafe reake rear- rebab rebak rebar rebbe reber rebra reefa reefe reere refar refer reffe rekka rekke rere- reree

aaaaba aakera abaera abarka abeere aberra abraka abreak abrera aerfer afeefa affear affeer affere affre akbaba akeake akebar akkaba akkare akraba akraka araafa arbaer arbra areare arfara arfarf arkaea arkera arraba arrear arrere baabaa baabar bababe babare babbar baekke bakara bakebe bakkar bakker baraka barara barbae barbar barbee barber barbra barbre barera barfak barfee barker barrak barrea barrer bbbbbb beaker bearer bebark beebea beebee beefer beeker befree bekker beraba berake berare berbar berbee berber bereke berere berker berrer braker break- breaka breakb breake breare breefe breere brekka brekke earake ebrake eebree effare effere ekkara erbare erbree errare errea fabara fabber fabeae fakara fakeer fakfak fakker faraar farara farber farfar farrar fearer ferbar ferber