a-ak a-be a-ha aaaa aaab aaac aaae aaah aaba aabb aabc aabh aaca aacb aacc aace aach aack aaea aaec aage aagh aaha aahk aaka aake abaa abab abac abae abag abak abb- abba abbb abbe abca abcb abcc abch abec abee abha acaa acab acac acae acag acba acca accc acce acch ace- acea acec aceh acek acga acha ache achh acke aeac aecb aega aeka agac agag agba agca agcc agce agea agee agga agge agha aghe ahab ahac ahah ahha akaa akae akah akca akee akeg akha akka baaa baah baak baba babb babe bac- baca bacc bace bach back baek baga bage bagg bagh baha bak- baka bake bakh bbbb bbch bbeb bbga bcaa bcbc bcbg bcca bccc bcec bche beag beah beak beba bebb bebe beca bech beck beeb beeg beek bega begg beka beke bgca bhag bhca bhcc caaa caab caac caah caba cabe cabg cac- caca cacc cace cach cack caec caga cage cagg caha cahe caka cake cbac cbbc cbca cbcc cbce cbea cbec cbee cbga cbgb cbha cbka cbkg ccaa ccab ccac ccag ccba ccbc ccca cccb cccc ccee ccga ccgc ccha cche ceac ceba cec- ceca cece ceeb ceec cege ceke cgac cgcc cgcg chaa chab chac chae chag chah chak chca chce chch chea cheb chec chee cheh chek chgb chge chha chka chkb ckac ckbc ckbe ckch ckck ckga eaba eabh eaca eacc each eaec eaga eage ebac ebba ebbc ebcc ecaa ecac ecbc ecbe ecca eccb eccc ecce echa eche ecka eeca eeea eeee eega eeka eeke egaa egae egba egbe egcc egcg egea egec egee eggb egge eggh eghe eghh ehaa ehcc ehea eheh eka- ekab ekch ekeb ekek ekka gaba gabb gabe gace gach gack gaea gaec gaga gage gagg gaha gahe gbag gc-c gcaa gcbc gccc geab geba gebe geca gece geck geek gege gegg geha gggg gghg ghea ghee gheg haab haag haak haba habe hace hack haec hag- haga hage hagg hagh haha haka hake hakk hbag hcbc hcca hccb hccc hcch hcgh heah hebb hebe heca hech heck heeb heeg heek hega hege hegg hegh hehe heka heke hgah hggc hhaa hhgg hhhh hkcc kaaa kaab kaag kaak kaba kabb kabc kabe kabg kacb kacc kace kach kaeh kag- kaga kagb kagc kage kagg kagh kaha kahc kahe kaka kakc kake kakh kakk kbaa kbab kbac kbae kbak kbba kbbb kbbc kbbe kbbg kbbk kbca kbcb kbce kbch kbck kbeb kbec kbee kbeh kbek kbga kbgb kbge kbgg kbgh kbhb kbhc kbhe kbhh kbkb kbkg kbkk kcaa kcab kcac kcah kcba kcbc kcbk kcca kccb kccc kcck kcea kceb kcec kcee kceg kcgc kcha kche kchg kchh kchk kckc kckk kea- keag keak keba kebb kebc kebe keca kecg kech keck keeh keek kega kege kegg kegh kegk kehk keka kekb kekc keke kgab kgac kgak kgba kgbb kgbc kgcb kgcc kgce kgeb kgec kgga kggg khab khac khak khbc khca khcb khcc khch khck kheb khec khgc khge khgg khhg khhk khka khke khkk kkaa kkac kkag kkba kkbb kkbe kkbg kkcb kkch kkck kkea kkeg kkgb kkha kkhb kkhh kkhk kkkk