-ic a-a a-b a-c a-i a-z aaa aab aac aai aak aao aar aas aaz ab- aba abb abc abi abk abo abr abs abz ac- aca acb acc aci ack aco acr acs acz ai- aia aib aic aii aik aio air ais aiz aka akb akc aki akk ako akr aks aoa aob aoc aoi aok aoo aor aos ar- ara arb arc ari ark aro arr ars arz as- asa asb asc asi ask aso asr ass asz az- aza azb azi azo azs azz baa bab bac bai bak bao bar bas baz bba bbb bbc bbi bbk bbo bbr bbs bca bcb bcc bci bck bco bcr bcs bcz bi- bia bib bic bii bik bio bir bis biz bka bkb bkc bkk bko bkr bks boa bob boc boi bok boo bor bos boz bra brb bri brk bro brr brs brz bsa bsb bsc bsi bsk bso bsr bss bza bzo bzr bzs bzz c-- caa cab cac cai cak cao car cas caz cba cbb cbc cbi cbk cbo cbr cbs cbz cca ccb ccc cci cck cco ccr ccs ccz ci- cia cib cic cii cik cio cir cis cka ckb ckc cki cko cks co- coa cob coc coi cok coo cor cos coz cra crb crc cri crk cro crr crs crz csa csb csc csi csk cso csr css csz cz- czc czk czo ia- iaa iab iac iai iao iar ias iaz iba ibb ibc ibi ibk ibo ibr ibs ibz ica icb icc ici ick ico icr ics icz iia iib iic iii iio iir iis ika ikb ikc iki ikk iko ikr iks io- ioa iob ioc ioi ioo ior ios ir- ira irb irc iri irk iro irr irs is- isa isb isc isi isk iso isr iss iza izi izo izz k-z ka- kaa kab kac kai kak kao kar kas kaz kba kbb kbc kbi kbk kbo kbr kbs kbz kca kcb kcc kci kck kcr kcs kia kib kic kii kik kio kir kis kiz kkb kkc kki kkk kkr kks koa kob koc koi kok koo kor kos koz kra krc kri krk kro krr krs ksa ksb ksc ksi ksk kso ksr kss kzo o-i oaa oab oac oai oak oao oar oas ob- oba obb obc obi obk obo obr obs oc- oca ocb occ oci ock oco ocr ocs ocz oia oib oic oii oik oio oir ois oiz oka okb okc oki okk oko okr oks oo- ooa oob ooc ooi ook ooo oor oos or- ora orb orc ori ork oro orr ors orz os- osa osb osc osi osk oso osr oss oza ozo ozs ozz ra- raa rab rac rai rak rao rar ras raz rba rbb rbc rbi rbk rbo rbr rbs rca rcb rcc rci rco rcr rcs ria rib ric rii rik rio rir ris riz rkb rkc rkk rko rks rkz roa rob roc roi rok roo ror ros roz rra rrb rrc rri rrk rrr rrs rsa rsb rsc rsi rsk rso rsr rss rza rzb rzo saa sab sac sai sak sao sar sas saz sba sbb sbc sbi sbk sbo sbr sbs sca scb scc sci sck sco scr scs sia sib sic sii sik sio sir sis sk- ska skb skc ski skk sko skr sks soa sob soc soi sok soo sor sos soz sr- sra srb src sri srk sro srr srs ss- ssa ssb ssc ssi ssk sso ssr sss ssz sza szi szr zaa zab zac zai zak zao zar zas zaz zbb zbc zbr zbs zco zcs zia zib zik zio zir zis ziz zka zks zo- zoa zob zoc zoi zok zoo zor zos zro zrs zsa zsi zsz zzr zzs zzz