a-ha aaaa aaab aaac aaaf aaah aaar aaba aabb aabc aabh aabt aaca aacb aacc aacf aach aaco aacr aact aafa aafb aafc aaff aaha aaoo aara aarc aaro aart aata aatc aatf aatt abaa abab abac abaf abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abcf abch abcr abct abff abha abho abhr aboa abob abof aboh aboo abor abot abra abrc abro abta ac-t acaa acab acac acar acat acba acca accc accf acch acco acct acfc acft acha achh acho achr acht acoa acoh acor acot acr- acra acrc acro acrr acta actc actf acth acto actt afaa afao afar afat afca afcb afcc afch affa affc affo afft afoa afoo afor afr- afra afrc afro afta aftc ahab ahac ahah ahar ahat ahfa ahha ahoa ahor ahot ahra ahrc ahrr ahta ahto aoah aoba aoca aora aorb aort aotc aotf arab arac araf arah arar arat arba arbh arc- arca arch arco arct arfa arfb arfc arff arft arh- aroa arob aroo aror arr- arra arrc arrh arro arrr arrt arta artc arth arto artr at-t ataa atab atac atar atat atca atcc atcf atch atco atcr atfb atfc atha atho atob atoc atof ator atot atra atrc atro atta atto attr baaa baaf baah baar baat baba babb babo babr bac- baca bacc bach baco bact bafc baff bafo baft baha baho bahr baht baoh bar- bara barb barc barf barh baro barr bart bata batc batf bath bato batt bbbb bbch bbfc bbrc bcaa bcar bcat bcbc bcca bccc bcfc bcof bcor bcra bctc bfca bfta bftt bhao bhar bhat bhca bhcc bhff bhor bhot bhra bhrt boab boac boar boat boba bobb bobo boca boch boco bofa boff bofh boha boho bohr boht boob booc boof booh boor boot bor- bora borf borh boro borr bort bota botb both boto bott brab brac braf brah brao brat brca brcb brfc broa brob broc broh broo bror brot brrr brtc btaa btaf btcc btfc btob btor btrc btrt bttb c-bo caaa caab caac caaf caah caat caba cabf cabo cac- caca cacc cach caco cacr cafa cafb cafc caff caha caht caor cara carb carc carf caro carr cart cat- cata catb catc catf cath cato catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbfb cbfc cbha cbot cbrh cbrt cbta cbtc cbtf ccaa ccab ccac ccaf ccar ccat ccba ccbc ccca cccb cccc cccf ccfa ccfc ccff ccha cchr ccob ccoc ccra ccrc ccrf ccrt cctb cctc cctt cfaa cfab cfac cfao cfar cfbc cfbr cfbt cfca cfcb cfcf cfco cffb cffr cfoa cfor cfra cfrb cfrt cfta cftc cfth cftr chaa chab chac chaf chah chao char chat chca chch chfa chfc chfr chha choc choh choo chor chra chrb chrc chrf chro chrr chrt chto chtr chtt coat coba cobb cobh cobo coca coch coco coct cofc coff coft coha coho coob coof cooh coot cor- cora corb corc corf coro corr cort cota cotb cotc coth coto cott crab crac craf crar crat crbc crca crcc crcr crfc crob croc croh croo cror crot crrt crtc crtf ctab ctba ctca ctcf ctfc ctfo ctor ctot ctrc ctta faaa faac faah faba fabo faca facc fach fact fafa fafc faff fafo faha fahr fara farb farc faro farr fart fata fatc fatf fath fato fatt fbar fcab fcar fcat fcba fcca fccf fcch fcot fcra fcto ffar ffcc ffff ffrr fftf foaf foar foba fobt foca foch foco fofo fohr foof foot for- fora forb foro forr fort fota foth foto fott frab frac frat frbc frcc frfc frob froh frot frta ft-c ftfc haab haaf haar haat haba habo habt haco hafb haff haft haha haho haht haor hara harc harf harh haro harr hart hata hatb hath hato hatt hbar hbfc hboc hcat hcbc hcca hccb hccc hcch hcfa hcfc hfba hhaa hhat hhhh hhof hoac hoar hoat hoba hobo hoca hoch hocr hoff hoha hoho hoof hoor hoot hora horc horo horr hort hota hotb hoth hoto hotr hott hrac hrfc hrob hrrc hrta hrtb htab htcc htfc htoh htra httr oafc oafo oara oath obba obbo obor obot obra obrh obro ocab ocac ocat ocbc occa occc occt ocfa ocha ocht ocra ocro ocrr oct- octa octo ofah ofcr off- offa offc offh offo offr ofor ofra ofta ohba ohcc ohho ohob ohoh ohra ohta ohto ooaa ooba oocr ooff ooha ooho oooh oooo oora oort ootb orab orac orah orao orar orat orba orbb orbo orca orch orco orff oro- orof oror orot orra orro orta ortc orth orto otac otar otfc otha otho othr oto- otof otoh otoo otor otra otro otta otto raab raaf raat raba rabb rabo rac- raca racc rach raco ract rafa rafc raff raft raha rahr raht raob raoc raoh rara rarb rarf raro rata ratf rath rato ratt rbaf rbbb rbbr rboh rcac rcaf rcbc rcbo rccb rccc rcfc rchb rctc rffc rftc rhoa rhob rhoc rhoh roab roaf roar roat rob- roba robb robo robt roca rocc roch roco rofc roff rofo roha rohr roob roof roor root rora rorc roro rort rota rotc roth roto rotr rott rrah rrat rrfc rrrr rtbf rtca rtcc rtfb rtfc taa- taaf taar taat taba tabb tabc tabo taca tacc tach taco tact tafa tafc taff tafo taft taha taho tahr taoa taor tara tarb tarc tarf taro tarr tart tata tatb tath tato tatr tatt tbaf tbar tbca tbcb tbcc tbrb tbta tcca tccc tcfc tch- tcha tchh tcho tchr tctc tfca tfot tftc thaa thao thar that thca thch thof thoo thor thot thra thro thtb thtr toab toat toba tobo tobt toca toch toco tofa toff tofo toft toho tooa toof tooh toor toot tora torc torf toro torr tort tota totc toth toto totr tott traa trab trac traf trao trat trca trcc trfc trfr troa troc troo trot trra trtc trtr ttab ttbb ttfa ttfc ttff tttt