a-ha aaaa aaab aaac aaad aaah aaap aaar aaba aabb aabc aabd aabh aabp aaca aacb aacc aacd aach aacp aacr aada aadc aaha aapa aapc aaph aara aarc aard aarp abaa abab abac abad abap abar abb- abba abbb abbr abca abcb abcc abcd abch abcp abcr abda abha abhr abpa abpc abpd abpp abpr abra abrc acaa acab acac acad acap acar acba acca accc accd acch accp acda acdb acdc acdp acha achh achp achr acpa acpd acpr acr- acra acrc acrr adaa adab adac adad adah adap adar adba adbc adcc adda addc addd addr adha adhd adp- adra ahab ahac ahad ahah ahar ahha ahra ahrc ahrr apac apah apap apar apba apbr apca apcb apcc apcd apcr apda apdd aph- apha aphc appa appc appd apph appr apra aprc arab arac arad arah arap arar arba arbh arc- arca arch arda ardc arh- arpa arr- arra arrc arrh arrr baaa baad baah baar baba babb babr bac- baca bacc bach bada badb badd badh badr baha bahr bapa bapc bapp bar- bara barb barc bard barh barr bbad bbbb bbch bbdd bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcda bchd bcpp bcra bd-r bdbc bddc bddh bdpc bhar bhca bhcc bhra bpcp bpda bphc bprc bprd brab brac brad brah brca brcb brda brrr c-cd caaa caab caac caah caap caba cac- caca cacc cach cacr cada cadc cadd cadr caha capa capb capc capd caph capp cara carb carc card carp carr cbac cbar cbbc cbca cbcc cbcp cbcr cbdb cbdc cbha cbpc cbpp cbrd cbrh ccaa ccab ccac ccad ccap ccar ccba ccbc ccca cccb cccc cccp ccdc ccdh ccdp ccdr ccha cchp cchr ccpa ccpp ccpr ccra ccrc ccrp cd-r cdaa cdac cdad cdba cdda cddb cddr chaa chab chac chad chah chap char chbp chca chch chcp chha chpa chpp chpr chra chrb chrc chrd chrp chrr cpaa cpac cpad cpap cpbc cpca cpha cppa cppd crab crac crap crar crbc crca crcc crcr crda crdc crpc daab daad daap daar daba dabb dabp daca dada daha dahp dapa dapp dara darb darc dard darp darr dbar dbcc dbcp dbpc dbpd dcbc dcca dccb dccc dccp dcdb dcra dddd ddrc dhaa dhad dhap dhar dhbp dhcp dhpr dpaa dpac dpbc dpcp dphp dppa dppc dpph draa drab drac drad drap drar drba drbc drca drda drra haab haad haar haba hada hadh haha hapa happ hara harc hard harh harp harr hbar hbcd hcap hcbc hcca hccb hccc hcch hcdr hcpc hcrd hcrp hdca hdda hdra hhaa hhhh hhpa hhpc hpac hpcc hpdh hrac hrad hrap hrdc hrpc hrpp hrrc paap paar paba paca pacd pach pada padd paha pahp papa papb papp papr par- para parc pard parp parr pbac pbar pbcc pbpa pcaa pcad pcap pcba pcbc pcca pccc pcha pchp pcpb pcpp pcra pcrc pcrd pdac pdca pdcp pdpa pdpr pdrc phad phah phar phcc phpa phrr ppac ppad ppap ppar ppcc ppcd pppa pppd pppp pprc prad prar prbc prca prcc prcd prcp prpd prrd raab raad raba rabb rac- raca racc rach rada radc radd radh radr raha rahr rapa rapc rapd raph rapp rara rarb rbbb rbbr rcac rcbc rccb rccc rcdc rchb rcpd rcrd rdac rdap rdbp rdpc rhap rhcp rpca rpdp rrad rrah rrrr