a-a a-c aaa aac aah aan aao aas ac- aca acc ach acn aco acs aha ahc ahh ahn aho ahs an- ana anc anh ann ano ans aoa aoc aoh aon aoo aos as- asa asc ash asn aso ass c-- caa cac cah can cao cas cca ccc cch ccn cco ccs ch- cha chc chh chn cho chs cn- cna cnc cnh cnn cno cns co- coa coc coh con coo cos csa csc csh csn cso css haa hac hah han hao has hca hcc hch hcn hco hcs hha hhc hhh hhn hho hhs hna hnc hnh hnn hno hns hoa hoc hoh hon hoo hos hsa hsc hsh hsn hss naa nac nah nan nao nas nca ncc nch ncn nco ncs nha nhc nhh nhn nhs nna nnc nnh nnn nno nns no- noa noc noh non noo nos nsa nsc nsh nsn nso nss oaa oac oah oan oao oas oc- oca occ och ocn oco ocs oha ohc ohh ohn oho ohs on- ona onc onh onn ono ons oo- ooa ooc ooh oon ooo oos os- osa osc osh osn oso oss saa sac sah san sao sas sca scc sch scn sco scs sh- sha shc shh shn sho shs sna snc snn sno sns soa soc soh son soo sos ss- ssa ssc ssh ssn sso sss