a-be a-do aaaa aaab aaac aaad aaae aaba aabb aabc aabd aaca aacb aacc aacd aace aaco aacu aada aadc aade aadu aaea aaec aaoe aaoo abaa abab abac abad abae abau abb- abba abbb abbe abbo abca abcb abcc abcd abda abdo abdu abec abed abee aboa abob abod aboo abou abua abud abue acaa acab acac acad acae acba acca accc accd acce acco accu acda acdb acdc acde ace- acea acec aced acoa acod acoe acou acu- acue acuo adaa adab adac adad adae adao adba adbc adcc adda addc addd adde addo addu adea adeb adee adeo adob adoc adod adoe adoo adua adub adue aeac aecb aede aoba aoca aoce aoeu auaa aube auca auce audc aude audo baaa baad baba babb babe babo babu bac- baca bacc bace baco bada badb badd bade bado badu baed bau- baud bbad bbau bbbb bbdd bbdo bbeb bcaa bcbc bcca bccc bcda bcde bcec bcuc bdbc bddc bead beau beba bebb bebe bebo beca becu beda bede bedo bedu beeb beed beo- beod boab boac boad boba bobb bobe bobo bobu boca boce boco bocu boda bodb bode bodo bodu boea boec boee boeo boob booc bood booe boua boud boue buad buba bubb bube bubo bubu buca bucc buce buco bucu buda budb budd bude budo budu buea bueu c-bo c-cd caaa caab caac caba cabe cabo cabu cac- caca cacc cace caco cada cadc cadd cade cado cadu caec caeu caod cauc cauo cbac cbbc cbca cbcc cbce cbcu cbdb cbdc cbdo cbea cbec cbee ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccu ccdc cced ccee ccob ccoc ccod ccuc cd-e cdaa cdac cdad cdba cdda cddb cdec ceac cead ceba cebu cec- ceca cece ceco ceda cedd cede cedo cedu ceeb ceec ceou coad coba cobb cobe cobo cobu coca coce coco cocu coda codd code coed coob cood coua coub coud coue cuau cub- cuba cubb cube cuca cucc cuce cuda cude cued d-bo daab daad daae daau daba dabb dabo dabu daca dace dada dade dado dadu daeb daeu daou daub daud daue dbcc dcbc dcca dccb dccc dccu dcdb dddd ddoc ddub deac dead deae deau deba debe debu dec- deca decc decd dece deco deda dedd dede dedo dedu deeb deed deua deue doab doae doba dobb dobe dobu doca doce doco docu dod- doda dodd dode dodo doea doob dood doub douc doud doue duaa duab duad dub- duba dubb dubc dube dubu duca duce duco duda dudd dude dudo dudu duo- eaba eaca eacc eada eadb eadd eaec ebac ebba ebbc ebbo ebcc ebed eboe eboo ecaa ecac ecad ecao ecbc ecbe ecca eccb eccc ecce ecco ecdc eced eco- ecod ecou ecua edac edad edca edda eddc edde eddo ede- edea edoc edod edou educ eeca eede eedu eeea eeee eeoc eocd eode euba eubc eucd eude o-eo oaau oade obad obba obbo obea obec obed oboe ocab ocac ocad ocbc occa occc oce oced ocee odac odbo odda oddd odea oded odeo odoo odou oec- oeca oecc oedo oeec ooaa ooba oobe ooda oooo ouac ouad oucc oudc oude ouea oued ouu- uabc uaca uaoc uaua ubac ubba ubbe ubbo uboc ubod ubud ucad ucbc ucca ucdc ucdd ucea ucua udaa udad udau udbc udca udea udoo ueba ueda uocc uuoc uuuu