a-be aaaa aaab aaac aaae aaam aaba aabb aabc aabm aaca aacb aacc aace aacm aaco aaea aaec aaem aama aamb aamc aame aamo aaoe aaoo abaa abab abac abae abam abb- abba abbb abbe abbo abca abcb abcc abec abee abma abmb abmc aboa abob aboo acaa acab acac acae acba acca accc acce accm acco ace- acea acec acem acma acmc acme acoa acoe acom aeac aecb aeom amaa amac amae amam amb- amba ambe ambo amca amcc amco amec amee amm- amma amme ammo amob amoc amoo aoba aoca aoce aoma baaa baam baba babb babe babm babo bac- baca bacc bace baco bama bamb bamc bame bamm bbbb bbcm bbeb bcaa bcam bcbc bcca bccc bccm bcec bcma beam beba bebb bebe bebo beca beeb beem bema beme beo- bmaa bmce bmoc boab boac boba bobb bobe bobo boca boce bocm boco boea boec boee boeo boma bomb bome boob booc booe boom c-bo caaa caab caac caam caba cabe cabo cac- caca cacc cace cacm caco caec caem cama camb camc came camm camo 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 ccob ccoc ccom ceac ceba cec- ceca cece cecm ceco ceeb ceec ceem cema cemb ceme cemm cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmoc coba cobb cobe cobo coca coce coco com- coma comb comc come comm como coob coom eaba eaca eacc eaec eama eame eaom ebac ebam ebba ebbc ebbo ebcc eboe eboo ecaa ecac ecam ecao ecbc ecbe ecca eccb eccc ecce eccm ecco ecem ecma eco- eeca eeea eeee eemo eeoc emac emae emam emba embe embo emcc emco emma emme maaa maac maam maba mabe mabo mac- maca macb macc mace maco maee maem maeo mama mamc mame mamo maoc mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mcmc mebe mebo mec- meca mecc mece meco meem mema memc meme memo meoc mmaa mmab mmac mmcc mmcm mmea mmmc mmmm moaa moab moac moam moba mobb mobe mobo moca moco moea moma mome momo mooa moob mooc mooe o-eo oama obba obbo obea obec oboe ocab ocac ocam ocbc occa occc oce ocee ocma ocom oec- oeca oecc oeec oeme omac omam omao ombe ombo omca omee omeo omma omo- omoa omoe omoo ooaa ooba oobe ooma oome oooo