-ic a-a a-b a-c a-i aaa aab aac aah aai aas ab- aba abb abc abh abi abs ac- aca acb acc ach aci acs aha ahb ahc ahh ahi ahs ai- aia aib aic aih aii ais as- asa asb asc ash asi ass baa bab bac bah bai bas bba bbb bbc bbh bbi bbs bca bcb bcc bch bci bcs bha bhb bhc bhh bhi bhs bi- bia bib bic bih bii bis bsa bsb bsc bsh bsi bss c-- caa cab cac cah cai cas cba cbb cbc cbh cbi cbs cca ccb ccc cch cci ccs ch- cha chb chc chh chi chs ci- cia cib cic cih cii cis csa csb csc csh csi css h-i haa hab hac hah hai has hba hbb hbc hbh hbi hbs hca hcb hcc hch hci hcs hha hhb hhc hhh hhi hhs hia hib hic hih hii his hsa hsb hsc hsh hsi hss ia- iaa iab iac iah iai ias iba ibb ibc ibh ibi ibs ica icb icc ich ici ics iha ihb ihc ihh ihi ihs iia iib iic iih iii iis is- isa isb isc ish isi iss saa sab sac sah sai sas sba sbb sbc sbh sbi sbs sca scb scc sch sci scs sh- sha shb shc shh shi shs sia sib sic sih sii sis ss- ssa ssb ssc ssh ssi sss