a-a a-c aaa aac aah aar aas ac- aca acc ach acr acs aha ahc ahh ahr ahs ar- ara arc arh arr ars as- asa asc ash asr ass c-- caa cac cah car cas cca ccc cch ccr ccs ch- cha chc chh chr chs cra crc crh crr crs csa csc csh csr css haa hac hah har has hca hcc hch hcr hcs hha hhc hhh hhr hhs hr- hra hrc hrh hrr hrs hsa hsc hsh hsr hss ra- raa rac rah rar ras rca rcc rch rcr rcs rh- rha rhc rhh rhr rhs rra rrc rrh rrr rrs rsa rsc rsh rsr rss saa sac sah sar sas sca scc sch scr scs sh- sha shc shh shr shs sr- sra src srh srr srs ss- ssa ssc ssh ssr sss