a-be aaaa aaab aaac aaae aaam aaba aabb aabc aabm aaca aacb aacc aace aacm aaea aaec aaem aama aamb aamc aame abaa abab abac abae abam abb- abba abbb abbe abca abcb abcc abec abee abma abmb abmc acaa acab acac acae acba acca accc acce accm ace- acea acec acem acma acmc acme aeac aecb amaa amac amae amam amb- amba ambe amca amcc amec amee amm- amma amme baaa baam baba babb babe babm bac- baca bacc bace bama bamb bamc bame bamm bbbb bbcm bbeb bcaa bcam bcbc bcca bccc bccm bcec bcma beam beba bebb bebe beca beeb beem bema beme bmaa bmce caaa caab caac caam caba cabe cac- caca cacc cace cacm caec caem cama camb camc came camm cbac cbbc cbca cbcc cbce cbcm cbea cbec cbee cbme ccaa ccab ccac ccam ccba ccbc ccca cccb cccc cccm ccee ccma ccmb ccmc ccmm ceac ceba cec- ceca cece cecm ceeb ceec ceem cema cemb ceme cemm cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc eaba eaca eacc eaec eama eame ebac ebam ebba ebbc ebcc ecaa ecac ecam ecbc ecbe ecca eccb eccc ecce eccm ecem ecma eeca eeea eeee emac emae emam emba embe emcc emma emme maaa maac maam maba mabe mac- maca macb macc mace maee maem mama mamc mame mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mebe mec- meca mecc mece meem mema memc meme mmaa mmab mmac mmcc mmcm mmea mmmc mmmm