-th a-a a-b a-c a-t aaa aab aac aah aak aao aar aas aat ab- aba abb abc abh abk abo abr abs abt ac- aca acb acc ach ack aco acr acs act aha ahb ahc ahh ahk aho ahr ahs aht aka akb akc akh akk ako akr aks aoa aob aoc aoh aok aoo aor aos aot ar- ara arb arc arh ark aro arr ars art as- asa asb asc ash ask aso asr ass ast at- ata atb atc ath ato atr ats att baa bab bac bah bak bao bar bas bat bba bbb bbc bbh bbk bbo bbr bbs bbt bca bcb bcc bch bck bco bcr bcs bct bha bhb bhc bhh bhk bho bhr bhs bht bka bkb bkc bkk bko bkr bks bkt boa bob boc boh bok boo bor bos bot bra brb brh brk bro brr brs brt bsa bsb bsc bsh bsk bso bsr bss bst bta btb btc bth btk bto btr bts btt c-- caa cab cac cah cak cao car cas cat cba cbb cbc cbh cbk cbo cbr cbs cbt cca ccb ccc cch cck cco ccr ccs cct ch- cha chb chc chh chk cho chr chs cht cka ckb ckc ckh cko cks ckt co- coa cob coc coh cok coo cor cos cot cra crb crc crh crk cro crr crs crt csa csb csc csh csk cso csr css cst cta ctb ctc cth ctk cto ctr cts ctt haa hab hac hah hak hao har has hat hba hbb hbc hbh hbk hbo hbr hbs hbt hca hcb hcc hch hck hco hcr hcs hct hha hhb hhc hhh hhk hho hhr hhs hht hka hkb hkh hkk hko hkr hks hkt hoa hob hoc hoh hok hoo hor hos hot hr- hra hrb hrc hrh hrk hro hrr hrs hrt hsa hsb hsc hsh hsk hsr hss hst hta htb htc hth htk hto htr hts htt k-t ka- kaa kab kac kah kak kao kar kas kat kba kbb kbc kbh kbk kbo kbr kbs kca kcb kcc kch kck kcr kcs kct kha khh khk kho khr khs kkb kkc kkh kkk kkr kks kkt koa kob koc koh kok koo kor kos kot kra krc krk kro krr krs krt ksa ksb ksc ksh ksk kso ksr kss kst kta ktb ktc kth ktk kto ktr kts ktt oaa oab oac oah oak oao oar oas oat ob- oba obb obc obh obk obo obr obs obt oc- oca ocb occ och ock oco ocr ocs oct oha ohc ohh oho ohr ohs oht oka okb okc okk oko okr oks oo- ooa oob ooc ooh ook ooo oor oos oot or- ora orb orc orh ork oro orr ors ort os- osa osb osc osh osk oso osr oss ost ot- ota otb otc oth otk oto otr ots ott ra- raa rab rac rah rak rao rar ras rat rba rbb rbc rbh rbk rbo rbr rbs rbt rca rcb rcc rch rco rcr rcs rct rh- rha rhb rhc rhh rho rhr rhs rht rkb rkc rkk rko rks rkt roa rob roc roh rok roo ror ros rot rra rrb rrc rrh rrk rrr rrs rrt rsa rsb rsc rsh rsk rso rsr rss rst rta rtb rtc rtk rto rtr rts rtt saa sab sac sah sak sao sar sas sat sba sbb sbc sbh sbk sbo sbr sbs sbt sca scb scc sch sck sco scr scs sct sh- sha shb shc shh shk sho shr shs sht sk- ska skb skc skh skk sko skr sks skt soa sob soc soh sok soo sor sos sot sr- sra srb src srh srk sro srr srs srt ss- ssa ssb ssc ssh ssk sso ssr sss sst sta stb stc sth stk sto str sts stt taa tab tac tah tak tao tar tas tat tba tbb tbc tbh tbk tbo tbr tbs tbt tca tcb tcc tch tck tco tcr tcs tct th- tha thb thc thh thk tho thr ths tht tka tkb tkc tkk tko tkr tks tkt to- toa tob toc toh tok too tor tos tot tra trb trc trh trk tro trr trs trt tsa tsb tsc tsh tsk tso tsr tss tst tta ttb ttc tth ttk tto ttr tts ttt

a-ak a-ha a-ok aaaa aaab aaac aaah aaar aaas aaba aabb aabc aabh aabt aaca aacb aacc aach aack aaco aacr aacs aact aaha aahk aahs aaka aaoo aara aarc aaro aars aart aasa aasc aass aast aata aatc aatk aatt abaa abab abac abak abar abas abat abb- abba abbb abbo abbr abbs abbt abca abcb abcc abch abcr abcs abct abha abho abhr abhs aboa abob aboh abok aboo abor abos abot abra abrc abro abrs abs- absa abss abta abts ac-t acaa acab acac acar acas acat acba acca accc acch acco accs acct acha achh acho achr achs acht acks acoa acoh acor acos acot acr- acra acrc acro acrr acrs acsa acsc acss acst acta actc acth acto acts actt ahab ahac ahah ahar ahas ahat ahha ahhs ahoa ahok ahor ahot ahra ahrc ahrr ahrs ahsa ahso ahss ahta ahto ahts akaa akah akao akar akas akca akha akhs akka akko akok akos akot akr- akra aksa akst aoah aoba aoca aocs aoks aora aorb aors aort aoss aotc arab arac arah arak arar aras arat arba arbh arbs arc- arca arch arco arcs arct arh- arhs arka arkh arko arks aroa arob aroo aror aros arr- arra arrc arrh arrk arro arrr arrs arrt ars- arsa arsc arsk arso arst arta artc arth arto artr arts asaa asab asac asah asak asao asar asas asat asba asbo asc- asca ascb ascc asch asco ascr asct asha ashk ashs asht aska asko askr asks askt asob asoc asok asor asos asot asra asrc asro asrs assa assc assh assk asso assr asss asst asta