-ic a-a a-b a-c a-i aaa aab aac aah aai aar aas ab- aba abb abc abh abi abr abs ac- aca acb acc ach aci acr acs aha ahb ahc ahh ahi ahr ahs ai- aia aib aic aih aii air ais ar- ara arb arc arh ari arr ars as- asa asb asc ash asi asr ass baa bab bac bah bai bar bas bba bbb bbc bbh bbi bbr bbs bca bcb bcc bch bci bcr bcs bha bhb bhc bhh bhi bhr bhs bi- bia bib bic bih bii bir bis bra brb brh bri brr brs bsa bsb bsc bsh bsi bsr bss c-- caa cab cac cah cai car cas cba cbb cbc cbh cbi cbr cbs cca ccb ccc cch cci ccr ccs ch- cha chb chc chh chi chr chs ci- cia cib cic cih cii cir cis cra crb crc crh cri crr crs csa csb csc csh csi csr css h-i haa hab hac hah hai har has hba hbb hbc hbh hbi hbr hbs hca hcb hcc hch hci hcr hcs hha hhb hhc hhh hhi hhr hhs hia hib hic hih hii hir his hr- hra hrb hrc hrh hri hrr hrs hsa hsb hsc hsh hsi hsr hss ia- iaa iab iac iah iai iar ias iba ibb ibc ibh ibi ibr ibs ica icb icc ich ici icr ics iha ihb ihc ihh ihi ihr ihs iia iib iic iih iii iir iis ir- ira irb irc iri irr irs is- isa isb isc ish isi isr iss ra- raa rab rac rah rai rar ras rba rbb rbc rbh rbi rbr rbs rca rcb rcc rch rci rcr rcs rh- rha rhb rhc rhh rhi rhr rhs ria rib ric rih rii rir ris rra rrb rrc rrh rri rrr rrs rsa rsb rsc rsh rsi rsr rss saa sab sac sah sai sar sas sba sbb sbc sbh sbi sbr sbs sca scb scc sch sci scr scs sh- sha shb shc shh shi shr shs sia sib sic sih sii sir sis sr- sra srb src srh sri srr srs ss- ssa ssb ssc ssh ssi ssr sss