-th a-a a-b a-c a-t aaa aab aac aah aao aar aat ab- aba abb abc abh abo abr abt ac- aca acb acc ach aco acr act aha ahb ahc ahh aho ahr aht aoa aob aoc aoh aoo aor aot ar- ara arb arc arh aro arr art at- ata atb atc ath ato atr att baa bab bac bah bao bar bat bba bbb bbc bbh bbo bbr bbt bca bcb bcc bch bco bcr bct bha bhb bhc bhh bho bhr bht boa bob boc boh boo bor bot bra brb brh bro brr brt bta btb btc bth bto btr btt c-- caa cab cac cah cao car cat cba cbb cbc cbh cbo cbr cbt cca ccb ccc cch cco ccr cct ch- cha chb chc chh cho chr cht co- coa cob coc coh coo cor cot cra crb crc crh cro crr crt cta ctb ctc cth cto ctr ctt haa hab hac hah hao har hat hba hbb hbc hbh hbo hbr hbt hca hcb hcc hch hco hcr hct hha hhb hhc hhh hho hhr hht hoa hob hoc hoh hoo hor hot hr- hra hrb hrc hrh hro hrr hrt hta htb htc hth hto htr htt oaa oab oac oah oao oar oat ob- oba obb obc obh obo obr obt oc- oca ocb occ och oco ocr oct oha ohc ohh oho ohr oht oo- ooa oob ooc ooh ooo oor oot or- ora orb orc orh oro orr ort ot- ota otb otc oth oto otr ott ra- raa rab rac rah rao rar rat rba rbb rbc rbh rbo rbr rbt rca rcb rcc rch rco rcr rct rh- rha rhb rhc rhh rho rhr rht roa rob roc roh roo ror rot rra rrb rrc rrh rrr rrt rta rtb rtc rto rtr rtt taa tab tac tah tao tar tat tba tbb tbc tbh tbo tbr tbt tca tcb tcc tch tco tcr tct th- tha thb thc thh tho thr tht to- toa tob toc toh too tor tot tra trb trc trh tro trr trt tta ttb ttc tth tto ttr ttt

a-ha aaaa aaab aaac aaah aaar aaba aabb aabc aabh aabt aaca aacb aacc aach aaco aacr aact aaha aaoo aara aarc aaro aart aata aatc aatt abaa abab abac abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abch abcr abct abha abho abhr aboa abob aboh aboo abor abot abra abrc abro abta ac-t acaa acab acac acar acat acba acca accc acch acco acct acha achh acho achr acht acoa acoh acor acot acr- acra acrc acro acrr acta actc acth acto actt ahab ahac ahah ahar ahat ahha ahoa ahor ahot ahra ahrc ahrr ahta ahto aoah aoba aoca aora aorb aort aotc arab arac arah arar arat arba arbh arc- arca arch arco arct arh- aroa arob aroo aror arr- arra arrc arrh arro arrr arrt arta artc arth arto artr at-t ataa atab atac atar atat atca atcc atch atco atcr atha atho atob atoc ator atot atra atrc atro atta atto attr baaa baah baar baat baba babb babo babr bac- baca bacc bach baco bact baha baho bahr baht baoh bar- bara barb barc barh baro barr bart bata batc bath bato batt bbbb bbch bbrc bcaa bcar bcat bcbc bcca bccc bcor bcra bctc bhao bhar bhat bhca bhcc bhor bhot bhra bhrt boab boac boar boat boba bobb bobo boca boch boco boha boho bohr boht boob booc booh boor boot bor- bora borh boro borr bort bota botb both boto bott brab brac brah brao brat brca brcb broa brob broc broh broo bror brot brrr brtc btaa btcc btob btor btrc btrt bttb c-bo caaa caab caac caah caat caba cabo cac- caca cacc cach caco cacr caha caht caor cara carb carc caro carr cart cat- cata catb catc cath cato catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbha cbot cbrh cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccha cchr ccob ccoc ccra ccrc ccrt cctb cctc cctt chaa chab chac chah chao char chat chca chch chha choc choh choo chor chra chrb chrc chro chrr chrt chto chtr chtt coat coba cobb cobh cobo coca coch coco coct coha coho coob cooh coot cor- cora corb corc coro corr cort cota cotb cotc coth coto cott crab crac crar crat crbc crca crcc crcr crob croc croh croo cror crot crrt crtc ctab ctba ctca ctor ctot ctrc ctta haab haar haat haba habo habt haco haha haho haht haor hara harc harh haro harr hart hata hatb hath hato hatt hbar hboc hcat hcbc hcca hccb hccc hcch hhaa hhat hhhh hoac hoar hoat hoba hobo hoca hoch hocr hoha hoho hoor hoot hora horc horo horr hort hota hotb hoth hoto hotr hott hrac hrob hrrc hrta hrtb htab htcc htoh htra httr oara oath obba obbo obor obot obra obrh obro ocab ocac ocat ocbc occa occc occt ocha ocht ocra ocro ocrr oct- octa octo ohba ohcc ohho ohob ohoh ohra ohta ohto ooaa ooba oocr ooha ooho oooh oooo oora oort ootb orab orac orah orao orar orat orba orbb orbo orca orch orco oro- oror orot orra orro orta ortc orth orto otac otar otha otho othr oto- otoh otoo otor otra otro otta otto raab raat raba rabb rabo rac- raca racc rach raco ract raha rahr raht raob raoc raoh rara rarb raro rata rath rato ratt rbbb rbbr rboh rcac rcbc rcbo rccb rccc rchb rctc rhoa rhob rhoc rhoh roab roar roat rob- roba robb robo robt roca rocc roch roco roha rohr roob roor root rora rorc roro rort rota rotc roth roto rotr rott rrah rrat rrrr rtca rtcc taa- taar taat taba tabb tabc tabo taca tacc tach taco tact taha taho tahr taoa taor tara tarb tarc taro tarr tart