a-ha aaaa aaab aaac aaad aaah aaar aaba aabb aabc aabd aabh aabt aaca aacb aacc aacd aach aacr aact aada aadc aadt aaha aara aarc aard aart aata aatc aatt abaa abab abac abad abar abat abb- abba abbb abbr abbt abca abcb abcc abcd abch abcr abct abda abha abhr abra abrc abta ac-t acaa acab acac acad acar acat acba acca accc accd acch acct acda acdb acdc acdt acha achh achr acht acr- acra acrc acrr acta actc acth actt adaa adab adac adad adah adar adat adba adbc adcc adda addc addd addr adha adhd adq- adra adta ahab ahac ahad ahah ahaq ahar ahat ahha ahra ahrc ahrq ahrr ahta aqar aqda aqra arab arac arad arah araq arar arat arba arbh arc- arca arch arct arda ardc arh- arq- arqa arr- arra arrc arrh arrr arrt arta artc arth artr at-t ataa atab atac atad ataq atar atat atca atcc atch atcr atdt atha atra atrc atta attr baaa baad baah baar baat baba babb babr bac- baca bacc bach bact bada badb badd badh badr baha bahr baht baqa baqt bar- bara barb barc bard barh barq barr bart bata batc bath batt bbad bbbb bbbq bbch bbdd bbrc bcaa bcar bcat bcbc bcca bccc bcda bchd bcra bctc bd-r bdbc bddc bddh bhar bhat bhca bhcc bhra bhrt brab brac brad brah brat brca brcb brda brdt brrr brtc btaa btcc btdt btrc btrt bttb c-cd caaa caab caac caah caat caba cac- caca cacc cach cacr cada cadc cadd cadr caha caht caqh cara carb carc card carr cart cat- cata catb catc catd cath catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbdb cbdc cbha cbrd cbrh cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc ccdc ccdh ccdr ccha cchr ccra ccrc ccrt cctb cctc cctt cd-r cdaa cdac cdad cdba cdda cddb cddr chaa chab chac chad chah char chat chca chch chha chqr chqt chra chrb chrc chrd chrr chrt chtr chtt crab crac crar crat crbc crca crcc crcr crda crdc crrt crtc ctab ctba ctca ctrc ctta daab daad daar daba dabb dabt daca dact dada daha dara darb darc dard darr dart data datr datt dbar dbcc dbtt dcbc dcca dccb dccc dcct dcdb dchq dcra dctc dddd ddrc dhaa dhad dhar dhat dhqd dqcd dqdb draa drab drac drad drar drat drba drbc drca drda drra dtaa dtac dtcc dthd haab haad haar haat haba habt hada hadh haha haht hara harc hard harh harr hart hata hatb hath hatt hbar hbcd hcat hcbc hcca hccb hccc hcch hcdr hcrd hdca hdda hdra hdtt hhaa hhat hhhh hqac hrac hrad hrdc hrrc hrta hrtb htab htcc htra httr qa-c qada qadr qaha qara qcad qhat qqqq qtar qtch raab raad raat raba rabb rac- raca racc rach racq ract rada radc radd radh radr radt raha rahr raht raqt rara rarb rata rath ratt rbbb rbbr rcac rcbc rccb rccc rcdc rchb rcrd rctc rdac rqda rrad rrah rrat rrrr rtca rtcc rtdt taa- taar taat taba tabb tabc taca tacc tach tact tada taha tahr taqa tara tarb tarc tard tarq tarr tart tata tatb tath tatr tatt tbar tbca tbcb tbcc tbcd tbrb tbta tcad tcca tccc tcdd tch- tcha tchh tchr tctc tdac tddb tdra thaa thad thar that thca thch thdr thra thtb thtr traa trab trac trad trat trca trcc trra trtc trtr ttab ttbb tttt