a-ha aaaa aaab aaac aaad aaah aaar aaba aabb aabc aabd aabh aaca aacb aacc aacd aach aacr aacu aada aadc aadu aaha aara aarc aard aaru abaa abab abac abad abar abau abb- abba abbb abbr abca abcb abcc abcd abch abcr abda abdu abha abhr abra abrc abua abud acaa acab acac acad acar acba acca accc accd acch accu acda acdb acdc acha achh achr achu acr- acra acrc acrr acu- acur adaa adab adac adad adah adar adba adbc adcc adda addc addd addr addu adha adhd adhu adra adua adub adur ahab ahac ahad ahah ahar ahau ahha ahra ahrc ahrr ahua arab arac arad arah arar arau arba arbh arc- arca arch arda ardc ardu arh- arr- arra arrc arrh arrr arru arua arub arud auaa auca auch audc audh aur- aura aurd baaa baad baah baar baba babb babr babu bac- baca bacc bach bada badb badd badh badr badu baha bahr bahu bar- bara barb barc bard barh barr baru bau- baud baur bbad bbau bbbb bbch bbdd bbrc bcaa bcar bcbc bcca bccc bcda bchd bcra bcru bcuc bd-r bdbc bddc bddh bhar bhca bhcc bhra bhur bhuu brab brac brad brah brau brca brcb brda brrr bruc brud bruh buad buar buba bubb bubu buca bucc buch bucu buda budb budd budu buha buhr bur- bura burb burd burh burr buru c-cd caaa caab caac caah caba cabu cac- caca cacc cach cacr cada cadc cadd cadr cadu caha cara carb carc card carr cauc cbac cbar cbbc cbca cbcc cbcr cbcu cbdb cbdc cbha cbrd cbrh ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc cccu ccdc ccdh ccdr ccha cchr ccra ccrc ccuc cd-r cdaa cdac cdad cdba cdda cddb cddr chaa chab chac chad chah char chau chca chch chha chra chrb chrc chrd chrr chua chub chud chur crab crac crar crau crbc crbu crca crcc crcr crda crdc crub crud cuau cub- cuba cubb cuca cucc cuda cura curb curd curr daab daad daar daau daba dabb dabu daca dada dadu daha dahu dara darb darc dard darr daru daub daud daur dbar dbcc dcbc dcca dccb dccc dccu dcdb dcra dddd ddrc ddub dhaa dhad dhar dhau dhur draa drab drac drad drar drau drba drbc drca drda drra drua drub druu duaa duab duad duah duar dub- duba dubb dubc dubh dubu duca duch duda dudd dudu duha duhr duhu dura duru duur haab haad haar haba habu hada hadh hadu haha hara harc hard harh harr haru hau- haud hbar hbcd hcbc hcca hccb hccc hcch hcdr hcrd hdca hdda hdra hhaa hhhh hrac hrad hrdc hrrc hrud huac huah huba hubb huch hucu huda hudd hudu huhu hura hurd hurr huru huub raab raad raba rabb rabu rac- raca racc rach racu rada radc radd radh radr radu raha rahr rahu rara rarb raua raub rauc raud rbbb rbbr rcac rcbc rccb rccc rcdc rchb rcrd rdac rhau rrad rrah rrrr ruad ruah ruba rubb rubu ruca ruch ruda rudd ruhh ruhr rura rurc rurd ruru ruud uabc uaca uarc uaru uaua ubac ubar ubba ubra ubud ucad ucar ucbc ucca ucdc ucdd ucha ucrc ucua udaa udad udar udau udbc udca udra uh-d uhuh urac urad urau urba urca urch urda urdu urra urrh urur uuuu