-ic a-a a-b a-c a-i aaa aab aac aah aai aak aar aas ab- aba abb abc abh abi abk abr abs ac- aca acb acc ach aci ack acr acs aha ahb ahc ahh ahi ahk ahr ahs ai- aia aib aic aih aii aik air ais aka akb akc akh aki akk akr aks ar- ara arb arc arh ari ark arr ars as- asa asb asc ash asi ask asr ass baa bab bac bah bai bak bar bas bba bbb bbc bbh bbi bbk bbr bbs bca bcb bcc bch bci bck bcr bcs bha bhb bhc bhh bhi bhk bhr bhs bi- bia bib bic bih bii bik bir bis bka bkb bkc bkk bkr bks bra brb brh bri brk brr brs bsa bsb bsc bsh bsi bsk bsr bss c-- caa cab cac cah cai cak car cas cba cbb cbc cbh cbi cbk cbr cbs cca ccb ccc cch cci cck ccr ccs ch- cha chb chc chh chi chk chr chs ci- cia cib cic cih cii cik cir cis cka ckb ckc ckh cki cks cra crb crc crh cri crk crr crs csa csb csc csh csi csk csr css h-i haa hab hac hah hai hak har has hba hbb hbc hbh hbi hbk hbr hbs hca hcb hcc hch hci hck hcr hcs hha hhb hhc hhh hhi hhk hhr hhs hia hib hic hih hii hik hir his hka hkb hkh hki hkk hkr hks hr- hra hrb hrc hrh hri hrk hrr hrs hsa hsb hsc hsh hsi hsk hsr hss ia- iaa iab iac iah iai iar ias iba ibb ibc ibh ibi ibk ibr ibs ica icb icc ich ici ick icr ics iha ihb ihc ihh ihi ihk ihr ihs iia iib iic iih iii iir iis ika ikb ikc iki ikk ikr iks ir- ira irb irc iri irk irr irs is- isa isb isc ish isi isk isr iss ka- kaa kab kac kah kai kak kar kas kba kbb kbc kbh kbi kbk kbr kbs kca kcb kcc kch kci kck kcr kcs kha khh khi khk khr khs kia kib kic kih kii kik kir kis kkb kkc kkh kki kkk kkr kks kra krc kri krk krr krs ksa ksb ksc ksh ksi ksk ksr kss ra- raa rab rac rah rai rak rar ras rba rbb rbc rbh rbi rbk rbr rbs rca rcb rcc rch rci rcr rcs rh- rha rhb rhc rhh rhi rhr rhs ria rib ric rih rii rik rir ris rkb rkc rkk rks rra rrb rrc rrh rri rrk rrr rrs rsa rsb rsc rsh rsi rsk rsr rss saa sab sac sah sai sak sar sas sba sbb sbc sbh sbi sbk sbr sbs sca scb scc sch sci sck scr scs sh- sha shb shc shh shi shk shr shs sia sib sic sih sii sik sir sis sk- ska skb skc skh ski skk skr sks sr- sra srb src srh sri srk srr srs ss- ssa ssb ssc ssh ssi ssk ssr sss