a-a a-b a-c a-t aaa aab aac aak aam aao aar aas aat ab- aba abb abc abk abm abo abr abs abt ac- aca acb acc ack acm aco acr acs act aka akb akc akk akm ako akr aks ama amb amc amk amm amo amr ams amt aoa aob aoc aok aom aoo aor aos aot ar- ara arb arc ark arm aro arr ars art as- asa asb asc ask asm aso asr ass ast at- ata atb atc atm ato atr ats att baa bab bac bak bam bao bar bas bat bba bbb bbc bbk bbm bbo bbr bbs bbt bca bcb bcc bck bcm bco bcr bcs bct bka bkb bkc bkk bkm bko bkr bks bkt bma bmb bmc bmk bmm bmo bmr bms bmt boa bob boc bok bom boo bor bos bot bra brb brk brm bro brr brs brt bsa bsb bsc bsk bsm bso bsr bss bst bta btb btc btk btm bto btr bts btt c-- caa cab cac cak cam cao car cas cat cba cbb cbc cbk cbm cbo cbr cbs cbt cca ccb ccc cck ccm cco ccr ccs cct cka ckb ckc ckm cko cks ckt cma cmb cmc cmk cmm cmo cmr cms cmt co- coa cob coc cok com coo cor cos cot cra crb crc crk crm cro crr crs crt csa csb csc csk csm cso csr css cst cta ctb ctc ctk ctm cto ctr cts ctt k-t ka- kaa kab kac kak kam kao kar kas kat kba kbb kbc kbk kbm kbo kbr kbs kca kcb kcc kck kcm kcr kcs kct kkb kkc kkk kkm kkr kks kkt kma kmb kmc kmk kmm kmo kms kmt koa kob koc kok kom koo kor kos kot kra krc krk kro krr krs krt ksa ksb ksc ksk ksm kso ksr kss kst kta ktb ktc ktk ktm kto ktr kts ktt m-o m-r maa mab mac mak mam mao mar mas mat mba mbb mbc mbk mbm mbo mbr mbs mbt mc- mca mcb mcc mck mcm mco mcr mcs mct mka mkb mkc mkk mkm mko mkr mks mkt mma mmb mmc mmk mmm mmo mmr mms mmt moa mob moc mok mom moo mor mos mot mra mrb mrc mrk mrm mro mrr mrs mrt msa msb msc msk msm mso msr mss mst mta mtb mtc mtk mtm mto mtr mts mtt oaa oab oac oak oam oao oar oas oat ob- oba obb obc obk obm obo obr obs obt oc- oca ocb occ ock ocm oco ocr ocs oct oka okb okc okk oko okr oks om- oma omb omc omm omo omr oms omt oo- ooa oob ooc ook oom ooo oor oos oot or- ora orb orc ork orm oro orr ors ort os- osa osb osc osk osm oso osr oss ost ot- ota otb otc otk otm oto otr ots ott ra- raa rab rac rak ram rao rar ras rat rba rbb rbc rbk rbm rbo rbr rbs rbt rca rcb rcc rcm rco rcr rcs rct rkb rkc rkk rkm rko rks rkt rma rmb rmc rmm rmo rmr rms rmt roa rob roc rok rom roo ror ros rot rra rrb rrc rrk rrm rrr rrs rrt rsa rsb rsc rsk rsm rso rsr rss rst rta rtb rtc rtk rtm rto rtr rts rtt saa sab sac sak sam sao sar sas sat sba sbb sbc sbk sbm sbo sbr sbs sbt sca scb scc sck scm sco scr scs sct sk- ska skb skc skk skm sko skr sks skt sma smb smc smk smm smo smr sms smt soa sob soc sok som soo sor sos sot sr- sra srb src srk srm sro srr srs srt ss- ssa ssb ssc ssk ssm sso ssr sss sst sta stb stc stk stm sto str sts stt taa tab tac tak tam tao tar tas tat tba tbb tbc tbk tbm tbo tbr tbs tbt tca tcb tcc tck tcm tco tcr tcs tct tka tkb tkc tkk tkm tko tkr tks tkt tma tmb tmc tmk tmm tmo tmr tms tmt to- toa tob toc tok tom too tor tos tot tra trb trc trk trm tro trr trs trt tsa tsb tsc tsk tsm tso tsr tss tst tta ttb ttc ttk ttm tto ttr tts ttt

a-ak a-ok aaaa aaab aaac aaam aaar aaas aaba aabb aabc aabm aabt aaca aacb aacc aack aacm aaco aacr aacs aact aaka aama aamb aamc aamo aamr aams aaoo aara aarc aarm aaro aars aart aasa aasc aasm aass aast aata aatc aatk aatt abaa abab abac abak abam abar abas abat abb- abba abbb abbo abbr abbs abbt abca abcb abcc abcr abcs abct abma abmb abmc abms abmt aboa abob 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 accm acco accs acct acks acma acmc acms acoa acom acor acos acot acr- acra acrc acrm acro acrr acrs acsa acsc acsm acss acst acta actc acto acts actt akaa akam akao akar akas akca akka akko akok akom akos akot akr- akra aksa akst amaa amac amam amar amas amat amb- amba ambo ambr ambs amca amcc amco amcs amka amm- amma ammo amob amoc amok amoo amor amos amot amra amrc amro amsa amsc amso amss amst amta amtc amtk amto amts aoba aoca aocs aoks aoma aora aorb aors aort aoss aotc arab arac arak aram arar aras arat arba arbs arc- arca arcm arco arcs arct arka arko arks arma armc armm armo arms armt aroa arob arom aroo aror aros arr- arra arrc arrk arro arrr arrs arrt ars- arsa arsc arsk arso arst arta artc arto artr arts asaa asab asac asak asam asao asar asas asat asba asbm asbo asc- asca ascb ascc asco ascr asct aska asko