a-be aaaa aaab aaac aaae aaba aabb aabc aaca aacb aacc aace aacu aaea aaec aage abaa abab abac abae abag abau abb- abba abbb abbe abca abcb abcc abec abee abua abue abug acaa acab acac acae acag acba acca accc acce accu ace- acea acec acga acu- acue aeac aecb aega agac agag agau agba agca agcc agce agea agee agga agge aggu agua ague auaa aube auca auce auga auge auug baaa baba babb babe babu bac- baca bacc bace baga bage bagg bau- baug bbau bbbb bbeb bbga bcaa bcbc bcbg bcca bccc bcec bcuc beag beau beba bebb bebe beca becu beeb beeg bega begg begu bgca buba bubb bube bubu buca bucc buce bucu buea bueu buga buge bugg caaa caab caac caba cabe cabg cabu cac- caca cacc cace caec caeu caga cage cagg cauc cbac cbbc cbca cbcc cbce cbcu cbea cbec cbee cbga cbgb ccaa ccab ccac ccag ccba ccbc ccca cccb cccc cccu ccee ccga ccgc ccuc ceac ceba cebu cec- ceca cece ceeb ceec cege cgac cgcc cgcg cuau cub- cuba cubb cube cuca cucc cuce cuga eaba eaca eacc eaec eaga eage ebac ebba ebbc ebcc ecaa ecac ecbc ecbe ecca eccb eccc ecce ecua eeca eeea eeee eega egaa egae egba egbe egbu egcc egcg egea egec egee eggb egge euba eubc euge gaba gabb gabe gabu gace gaea gaec gaga gage gagg gagu gaua gaub gaue gbag gc-c gcaa gcbc gccc geab geba gebe geca gece gege gegg geue gggg guaa guac guag guba gubb gubu guca guga gugb guge gugg gugu uabc uaca uaua ubac ubba ubbe ucbc ucca ucea ucua ueba ugab ugcc ugcg uguu uuuu