-th a-a a-b a-c a-t aaa aab aac aah aak aar aas aat ab- aba abb abc abh abk abr abs abt ac- aca acb acc ach ack acr acs act aha ahb ahc ahh ahk ahr ahs aht aka akb akc akh akk akr aks ar- ara arb arc arh ark arr ars art as- asa asb asc ash ask asr ass ast at- ata atb atc ath atr ats att baa bab bac bah bak bar bas bat bba bbb bbc bbh bbk bbr bbs bbt bca bcb bcc bch bck bcr bcs bct bha bhb bhc bhh bhk bhr bhs bht bka bkb bkc bkk bkr bks bkt bra brb brh brk brr brs brt bsa bsb bsc bsh bsk bsr bss bst bta btb btc bth btk btr bts btt c-- caa cab cac cah cak car cas cat cba cbb cbc cbh cbk cbr cbs cbt cca ccb ccc cch cck ccr ccs cct ch- cha chb chc chh chk chr chs cht cka ckb ckc ckh cks ckt cra crb crc crh crk crr crs crt csa csb csc csh csk csr css cst cta ctb ctc cth ctk ctr cts ctt haa hab hac hah hak har has hat hba hbb hbc hbh hbk hbr hbs hbt hca hcb hcc hch hck hcr hcs hct hha hhb hhc hhh hhk hhr hhs hht hka hkb hkh hkk hkr hks hkt hr- hra hrb hrc hrh hrk hrr hrs hrt hsa hsb hsc hsh hsk hsr hss hst hta htb htc hth htk htr hts htt k-t ka- kaa kab kac kah kak kar kas kat kba kbb kbc kbh kbk kbr kbs kca kcb kcc kch kck kcr kcs kct kha khh khk khr khs kkb kkc kkh kkk kkr kks kkt kra krc krk krr krs krt ksa ksb ksc ksh ksk ksr kss kst kta ktb ktc kth ktk ktr kts ktt ra- raa rab rac rah rak rar ras rat rba rbb rbc rbh rbk rbr rbs rbt rca rcb rcc rch rcr rcs rct rh- rha rhb rhc rhh rhr rhs rht rkb rkc rkk rks rkt rra rrb rrc rrh rrk rrr rrs rrt rsa rsb rsc rsh rsk rsr rss rst rta rtb rtc rtk rtr rts rtt saa sab sac sah sak sar sas sat sba sbb sbc sbh sbk sbr sbs sbt sca scb scc sch sck scr scs sct sh- sha shb shc shh shk shr shs sht sk- ska skb skc skh skk skr sks skt sr- sra srb src srh srk srr srs srt ss- ssa ssb ssc ssh ssk ssr sss sst sta stb stc sth stk str sts stt taa tab tac tah tak tar tas tat tba tbb tbc tbh tbk tbr tbs tbt tca tcb tcc tch tck tcr tcs tct th- tha thb thc thh thk thr ths tht tka tkb tkc tkk tkr tks tkt tra trb trc trh trk trr trs trt tsa tsb tsc tsh tsk tsr tss tst tta ttb ttc tth ttk ttr tts ttt

a-ak a-ha aaaa aaab aaac aaah aaar aaas aaba aabb aabc aabh aabt aaca aacb aacc aach aack aacr aacs aact aaha aahk aahs aaka aara aarc aars aart aasa aasc aass aast aata aatc aatk aatt abaa abab abac abak abar abas abat abb- abba abbb abbr abbs abbt abca abcb abcc abch abcr abcs abct abha abhr abhs abra abrc abrs abs- absa abss abta abts ac-t acaa acab acac acar acas acat acba acca accc acch accs acct acha achh achr achs acht acks acr- acra acrc acrr acrs acsa acsc acss acst acta actc acth acts actt ahab ahac ahah ahar ahas ahat ahha ahhs ahra ahrc ahrr ahrs ahsa ahss ahta ahts akaa akah akar akas akca akha akhs akka akr- akra aksa akst arab arac arah arak arar aras arat arba arbh arbs arc- arca arch arcs arct arh- arhs arka arkh arks arr- arra arrc arrh arrk arrr arrs arrt ars- arsa arsc arsk arst arta artc arth artr arts asaa asab asac asah asak asar asas asat asba asc- asca ascb ascc asch ascr asct asha ashk ashs asht aska askr asks askt asra asrc asrs assa assc assh assk assr asss asst asta astb astc astr asts at-t ataa atab atac atak atar atas atat atbs atca atcc atch atck atcr atcs atha aths atka atkt atra atrc atrk atsb atsc atst atta attr atts baaa baah baak baar baas baat baba babb babr babs bac- baca bacc bach back bacs bact baha bahr bahs baht bak- baka bakh bakr baks bakt bar- bara barb barc barh bark barr bars bart basa basc bash bask bass bast bata batc bath bats batt bbas bbbb bbbs bbch bbhs bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bchs bcra bcrs bcsa bcsc bcss bctc bcts bhar bhat bhca bhcc bhhs bhra bhrt bkhs brab brac brah brak bras brat brca brcb brhs brka brkb brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bshs bskt bsra bssc bsts btaa btcc btcs bths btrc btrt btss bttb caaa caab caac caah caas caat caba cabs cac- caca cacc cach cack cacr caha cahs caht caka cara carb carc cark carr cars cart casa casb casc cash cask casr cass cast cat- cata catb catc cath cats catt cbac cbar cbat cbbc cbbs cbca cbcc cbcr cbcs cbct cbha cbhs cbka cbkr cbrh cbrt cbsa cbsc cbta cbtc ccaa ccab ccac ccar ccas ccat ccba ccbc ccca cccb cccc cccs ccha cchr cchs ccra ccrc ccrs ccrt ccsa ccss ccst cctb cctc cctt chaa chab chac chah chak char chas chat chca chch chcs chha chhs chka chkb chks chkt chra chrb chrc chrr chrs chrt chsc chsh chsr chst chtr chtt ckac ckat ckbc ckch ckck ckcs ckhs ckrc cksa cksb cksh ckst cktb ckts crab crac crar cras crat crbc crca crcc crcr crhs crkc crrt