-vac a-do aaaa aaab aaac aaad aaav aaba aabb aabc aabd aaca aacb aacc aacd aaco aacu aacv aada aadc aadu aaoo aava abaa abab abac abad abau abb- abba abbb abbo abca abcb abcc abcd abda abdo abdu aboa abob abod aboo abou abov abua abud abva abvd acaa acab acac acad acba acca accc accd acco accu acda acdb acdc acoa acod acou acu- acuo acvv adaa adab adac adad adao adba adbc adcc adda addc addd addo addu adob adoc adod adoo adua adub advb aoba aoca auaa auca audc audo avab avao avcc avco avda avou avva avvo baaa baad baba babb babo babu bac- baca bacc baco bada badb badd bado badu bau- baud bava bavu bbad bbau bbbb bbdd bbdo bcaa bcbc bcca bccc bcda bcuc bcvo bdav bdbc bddc boab boac boad boba bobb bobo bobu boca boco bocu boda bodb bodo bodu boob booc bood boua boud bova bovo buad buba bubb bubo bubu buca bucc buco bucu buda budb budd budo budu buvd bvdu c-bo c-cd caaa caab caac caba cabo cabu cac- caca cacc caco cada cadc cadd cado cadu caod cauc cauo cava cavo cavu cbac cbbc cbca cbcc cbcu cbdb cbdc cbdo cbva cbvb ccaa ccab ccac ccad ccba ccbc ccca cccb cccc cccu cccv ccdc ccob ccoc ccod ccuc ccvo cdaa cdac cdad cdba cdda cddb cdvd coad coba cobb cobo cobu coca coco cocu coda codd coob cood coua coub coud cova covo cuau cub- cuba cubb cuca cucc cuda cvac cvca cvcc d-bo daab daad daau daba dabb dabo dabu daca dada dado dadu daou daub daud dava dbcc dcbc dcca dccb dccc dccu dccv dcdb dcvd dddd ddoc ddub doab doba dobb dobu doca doco docu dod- doda dodd dodo doob dood doub douc doud duaa duab duad dub- duba dubb dubc dubu duca duco duda dudd dudo dudu duo- duva dvda dvoa oaau obad obba obbo ocab ocac ocad ocbc occa occc odac odbo odda oddd odoo odou odva ooaa ooba ooda oooo ouac ouad oucc oudc ouu- ovda ovo- ovod ovoo uabc uaca uaoc uaua ubac ubba ubbo uboc ubod ubud ucad ucav ucbc ucca ucdc ucdd ucua udaa udad udau udbc udca udoo uocc uovo uuoc uuuu uv-a uv-b uv-c uvaa uvac uvda uvvu vaad vaca vaco vada vado vadu vaud vava vbcc vdcc vdub voad voca voda vodo vooc voud vuca vuco vuda vudu vvob vvvv