-ic a-a a-b a-c a-i a-t aaa aab aac aai aak aao aar aas aat ab- aba abb abc abi abk abo abr abs abt ac- aca acb acc aci ack aco acr acs act ai- aia aib aic aii aik aio air ais ait aka akb akc aki akk ako akr aks aoa aob aoc aoi aok aoo aor aos aot ar- ara arb arc ari ark aro arr ars art as- asa asb asc asi ask aso asr ass ast at- ata atb atc ati ato atr ats att baa bab bac bai bak bao bar bas bat bba bbb bbc bbi bbk bbo bbr bbs bbt bca bcb bcc bci bck bco bcr bcs bct bi- bia bib bic bii bik bio bir bis bit bka bkb bkc bkk bko bkr bks bkt boa bob boc boi bok boo bor bos bot bra brb bri brk bro brr brs brt bsa bsb bsc bsi bsk bso bsr bss bst bta btb btc bti btk bto btr bts btt c-- caa cab cac cai cak cao car cas cat cba cbb cbc cbi cbk cbo cbr cbs cbt cca ccb ccc cci cck cco ccr ccs cct ci- cia cib cic cii cik cio cir cis cit cka ckb ckc cki cko cks ckt co- coa cob coc coi cok coo cor cos cot cra crb crc cri crk cro crr crs crt csa csb csc csi csk cso csr css cst cta ctb ctc cti ctk cto ctr cts ctt ia- iaa iab iac iai iao iar ias iat iba ibb ibc ibi ibk ibo ibr ibs ibt ica icb icc ici ick ico icr ics ict iia iib iic iii iio iir iis iit ika ikb ikc iki ikk iko ikr iks ikt io- ioa iob ioc ioi ioo ior ios iot ir- ira irb irc iri irk iro irr irs irt is- isa isb isc isi isk iso isr iss ist ita itb itc iti itk ito its itt k-t ka- kaa kab kac kai kak kao kar kas kat kba kbb kbc kbi kbk kbo kbr kbs kca kcb kcc kci kck kcr kcs kct kia kib kic kii kik kio kir kis kit kkb kkc kki kkk kkr kks kkt koa kob koc koi kok koo kor kos kot kra krc kri krk kro krr krs krt ksa ksb ksc ksi ksk kso ksr kss kst kta ktb ktc ktk kto ktr kts ktt o-i oaa oab oac oai oak oao oar oas oat ob- oba obb obc obi obk obo obr obs obt oc- oca ocb occ oci ock oco ocr ocs oct oia oib oic oii oik oio oir ois oit oka okb okc oki okk oko okr oks oo- ooa oob ooc ooi ook ooo oor oos oot or- ora orb orc ori ork oro orr ors ort os- osa osb osc osi osk oso osr oss ost ot- ota otb otc oti otk oto otr ots ott ra- raa rab rac rai rak rao rar ras rat rba rbb rbc rbi rbk rbo rbr rbs rbt rca rcb rcc rci rco rcr rcs rct ria rib ric rii rik rio rir ris rit rkb rkc rkk rko rks rkt roa rob roc roi rok roo ror ros rot rra rrb rrc rri rrk rrr rrs rrt rsa rsb rsc rsi rsk rso rsr rss rst rta rtb rtc rti rtk rto rtr rts rtt saa sab sac sai sak sao sar sas sat sba sbb sbc sbi sbk sbo sbr sbs sbt sca scb scc sci sck sco scr scs sct sia sib sic sii sik sio sir sis sit sk- ska skb skc ski skk sko skr sks skt soa sob soc soi sok soo sor sos sot sr- sra srb src sri srk sro srr srs srt ss- ssa ssb ssc ssi ssk sso ssr sss sst sta stb stc sti stk sto str sts stt taa tab tac tai tak tao tar tas tat tba tbb tbc tbi tbk tbo tbr tbs tbt tca tcb tcc tci tck tco tcr tcs tct tia tib tic tii tik tio tir tis tit tka tkb tkc tkk tko tkr tks tkt to- toa tob toc toi tok too tor tos tot tra trb trc tri trk tro trr trs trt tsa tsb tsc tsi tsk tso tsr tss tst tta ttb ttc tti ttk tto ttr tts ttt

a-ak a-ii a-ok aaaa aaab aaac aaai aaar aaas aaba aabb aabc aabi aabt aaca aacb aacc aaci aack aaco aacr aacs aact aaib aaic aaii aais aaka aaoo aara aarc aari aaro aars aart aasa aasc aasi aass aast aata aatc aatk aatt abaa abab abac abai abak abar abas abat abb- abba abbb abbi abbo abbr abbs abbt abca abcb abcc abci abcr abcs abct abia abib abic abir abis abit aboa abob abok aboo abor abos abot abra abrc abri abro abrs abs- absa absi abss abta abts ac-t acaa acab acac acai acar acas acat acba acca accc acci acco accs acct aci- acia acic acir acis acks acoa acor acos acot acr- acra acrc acri acro acrr acrs acsa acsc acsi acss acst acta actc acti acto acts actt aiai aias aiba aibo aica aicc aicr aics aiia aiib aiic aiir aika aiki aiko aiks aioc aioi aira airi airo airs airt aisa aisb aisi aisk aiso aisr aist aita aiti aitr aits aitt akaa akai akao akar akas akca akia akik akio akir akis akka akki akko akok akos akot akr- akra aksa aksi akst aoba aoca aocs aoki aoks aora aorb aors aort aoss aotc arab arac arai arak arar aras arat arba arbi arbs arc- arca arci arco arcs arct aria arib arii arik ario aris arit arka arki arko arks aroa arob aroi aroo aror aros arr- arra arrc arri arrk arro arrr arrs arrt ars- arsa arsc arsi arsk arso arst arta artc arti arto artr arts asaa asab asac