-ic a-a a-b a-c a-i aaa aab aac aah aai aak aas ab- aba abb abc abh abi abk abs ac- aca acb acc ach aci ack acs aha ahb ahc ahh ahi ahk ahs ai- aia aib aic aih aii aik ais aka akb akc akh aki akk aks as- asa asb asc ash asi ask ass baa bab bac bah bai bak bas bba bbb bbc bbh bbi bbk bbs bca bcb bcc bch bci bck bcs bha bhb bhc bhh bhi bhk bhs bi- bia bib bic bih bii bik bis bka bkb bkc bkk bks bsa bsb bsc bsh bsi bsk bss c-- caa cab cac cah cai cak cas cba cbb cbc cbh cbi cbk cbs cca ccb ccc cch cci cck ccs ch- cha chb chc chh chi chk chs ci- cia cib cic cih cii cik cis cka ckb ckc ckh cki cks csa csb csc csh csi csk css h-i haa hab hac hah hai hak has hba hbb hbc hbh hbi hbk hbs hca hcb hcc hch hci hck hcs hha hhb hhc hhh hhi hhk hhs hia hib hic hih hii hik his hka hkb hkh hki hkk hks hsa hsb hsc hsh hsi hsk hss ia- iaa iab iac iah iai ias iba ibb ibc ibh ibi ibk ibs ica icb icc ich ici ick ics iha ihb ihc ihh ihi ihk ihs iia iib iic iih iii iis ika ikb ikc iki ikk iks is- isa isb isc ish isi isk iss ka- kaa kab kac kah kai kak kas kba kbb kbc kbh kbi kbk kbs kca kcb kcc kch kci kck kcs kha khh khi khk khs kia kib kic kih kii kik kis kkb kkc kkh kki kkk kks ksa ksb ksc ksh ksi ksk kss saa sab sac sah sai sak sas sba sbb sbc sbh sbi sbk sbs sca scb scc sch sci sck scs sh- sha shb shc shh shi shk shs sia sib sic sih sii sik sis sk- ska skb skc skh ski skk sks ss- ssa ssb ssc ssh ssi ssk sss