a-ak a-be a-ha aaaa aaab aaac aaad aaae aaah aaba aabb aabc aabd aabh aaca aacb aacc aacd aace aach aack aada aadc aade aaea aaec aage aagh aaha aahk aaka aake abaa abab abac abad abae abag abak abb- abba abbb abbe abca abcb abcc abcd abch abda abec abed abee abgd abha acaa acab acac acad acae acag acba acca accc accd acce acch acda acdb acdc acde ace- acea acec aced aceh acek acga acha ache achh ackd acke adaa adab adac adad adae adag adah adak adba adbc adcc adda addc addd adde adea adeb adee adeh adha adhd aeac aecb aede aega aeka agac agad agag agba agca agcc agce agda agde agea aged agee agga agge agha aghe ahab ahac ahad ahah ahed ahha akaa akae akah akca aked akee akeg akha akka baaa baad baah baak baba babb babe bac- baca bacc bace bach back bada badb badd bade badh baed baek baga bage bagg bagh baha bak- baka bake bakh bbad bbbb bbch bbdd bbeb bbga bcaa bcbc bcbg bcca bccc bcda bcde bcec bchd bche bdbc bddc bddh bead beag beah beak beba bebb bebe beca bech beck beda bede beeb beed beeg beek bega begg beka beke bgca bhag bhca bhcc bkgd c-cd caaa caab caac caah caba cabe cabg cac- caca cacc cace cach cack cada cadc cadd cade caec caga cage cagg caha cahe caka cake cbac cbbc cbca cbcc cbce cbdb cbdc cbea cbec cbee cbga cbgb cbha cbka cbkg ccaa ccab ccac ccad ccag ccba ccbc ccca cccb cccc ccdc ccdh cced ccee ccga ccgc ccha cche cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceba cec- ceca cece ceda cedd cede ceeb ceec cege ceke cgac cgcc cgcg cged chaa chab chac chad chae chag chah chak chca chce chch chea cheb chec ched chee cheh chek chgb chgd chge chha chka chkb ckac ckbc ckbe ckch ckck ckga daab daad daae daag daba dabb daca dace dada dade daeb daga dage dagg dagh daha dahe daka dake dbag dbcc dcbc dcca dccb dccc dcdb dche dddd deac dead deae deak deba debe dec- deca decc decd dece deck deda dedd dede deeb deed deeg deek dega dege degh deha dek- deka deke dekh dgac dgca dgeg dgge dghe dgka dgkb dgkd dgkg dhaa dhad dhag dhak dhec dhed dhee dkba dkdc eaba eabh eaca eacc each eada eadb eadd eaec eaga eage ebac ebba ebbc ebcc ebed ecaa ecac ecad ecbc ecbe ecca eccb eccc ecce ecdc eced echa eche ecka edac edad edag edah edca edda eddc edde ede- edea edeh edge eeca eede eeea eeee eega eeka eeke egaa egad egae egba egbe egcc egcg egea egec egee eggb egge eggh eghd eghe eghh ehaa ehcc ehdd ehea eheh eka- ekab ekch ekeb eked ekek ekka gaba gabb gabe gace gach gack gada gadd gade gadk gaea gaec gaed gaga gage gagg gaha gahe gbag gbde gc-c gcaa gcbc gccc gcda gdca gddb geab gead geba gebe geca gece geck geda gedd gede geed geek gege gegg geha gggg gghg ghea ghee gheg haab haad haag haak haba habe hace hack hada hade hadh haec haed hag- haga hage hagg hagh haha haka hake hakk hbag hbcd hcbc hcca hccb hccc hcch hcgh hdbk hdca hdda head heah hebb hebe heca hech heck heda hedd hede hedg heeb heed heeg heek hega hege hegg hegh hehe heka heke hgah hggc hhaa hhgg hhhh hkcc kaaa kaab kaag kaak kaba kabb kabc kabd kabe kabg kacb kacc kacd kace kach kad- kada kadd kade kaeh kag- kaga kagb kagc kage kagg kagh kaha kahc kahe kaka kakc kake kakh kakk kbaa kbab kbac kbad kbae kbak kbba kbbb kbbc kbbd kbbe kbbg kbbk kbca kbcb kbce kbch kbck kbdb kbde kbdg kbeb kbec kbed kbee kbeh kbek kbga kbgb kbge kbgg kbgh kbhb kbhc kbhe kbhh kbkb kbkg kbkk kcaa kcab kcac kcad kcah kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kcda kcdc kcdd kcea kceb kcec kced kcee kceg kcgc kcha kche kchg kchh kchk kckc kckk kdaa kdab kdac kdad kdae kdag kdak kdbb kdbg kdca kdcc kdcd kdce kddb kddc kddd kddg kddk kdeb kdec kdge kdka kdkb kdkd kdkk kea- kead keag keak keba kebb kebc kebe keca kecg kech keck keda kedb kedc kedd kede kedg keed keeh keek kega kege kegg kegh kegk kehk keka kekb kekc keke kgab kgac kgak kgba kgbb kgbc kgcb kgcc kgcd kgce kgdb kgdc kgdd kgeb kgec kged kgga kggg khab khac khad khak khbc khbd khca khcb khcc khch khck khdc khdk kheb khec khed khgc khge khgg khhg khhk khka khke khkk kkaa kkac kkag kkba kkbb kkbd kkbe kkbg kkcb kkcd kkch kkck kkda kkdc kkdd kkdg kkea kked kkeg kkgb kkha kkhb kkhh kkhk kkkk