a-ha aaaa aaab aaac aaad aaah aaar aaba aabb aabc aabd aabh aaca aacb aacc aacd aach aacr aada aadc aaha aara aarc aard abaa abab abac abad abar abb- abba abbb abbr abca abcb abcc abcd abch abcr abda abha abhr abra abrc acaa acab acac acad acar acba acca accc accd acch acda acdb acdc acha achh achr acr- acra acrc acrr adaa adab adac adad adah adar adba adbc adcc adda addc addd addr adha adhd adra ahab ahac ahad ahah ahar ahha ahra ahrc ahrr arab arac arad arah arar arba arbh arc- arca arch arda ardc arh- arr- arra arrc arrh arrr baaa baad baah baar baba babb babr bac- baca bacc bach bada badb badd badh badr baha bahr bar- bara barb barc bard barh barr bbad bbbb bbch bbdd bbrc bcaa bcar bcbc bcca bccc bcda bchd bcra bd-r bdbc bddc bddh bhar bhca bhcc bhra brab brac brad brah brca brcb brda brrr c-cd caaa caab caac caah caba cac- caca cacc cach cacr cada cadc cadd cadr caha cara carb carc card carr cbac cbar cbbc cbca cbcc cbcr cbdb cbdc cbha cbrd cbrh ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc ccdc ccdh ccdr ccha cchr ccra ccrc cd-r cdaa cdac cdad cdba cdda cddb cddr chaa chab chac chad chah char chca chch chha chra chrb chrc chrd chrr crab crac crar crbc crca crcc crcr crda crdc daab daad daar daba dabb daca dada daha dara darb darc dard darr dbar dbcc dcbc dcca dccb dccc dcdb dcra dddd ddrc dhaa dhad dhar draa drab drac drad drar drba drbc drca drda drra haab haad haar haba hada hadh haha hara harc hard harh harr hbar hbcd hcbc hcca hccb hccc hcch hcdr hcrd hdca hdda hdra hhaa hhhh hrac hrad hrdc hrrc raab raad raba rabb rac- raca racc rach rada radc radd radh radr raha rahr rara rarb rbbb rbbr rcac rcbc rccb rccc rcdc rchb rcrd rdac rrad rrah rrrr