a-a a-c aaa aac aah aak aas ac- aca acc ach ack acs aha ahc ahh ahk ahs aka akc akh akk aks as- asa asc ash ask ass c-- caa cac cah cak cas cca ccc cch cck ccs ch- cha chc chh chk chs cka ckc ckh cks csa csc csh csk css haa hac hah hak has hca hcc hch hck hcs hha hhc hhh hhk hhs hka hkh hkk hks hsa hsc hsh hsk hss ka- kaa kac kah kak kas kca kcc kch kck kcs kha khh khk khs kkc kkh kkk kks ksa ksc ksh ksk kss saa sac sah sak sas sca scc sch sck scs sh- sha shc shh shk shs sk- ska skc skh skk sks ss- ssa ssc ssh ssk sss