a-a a-c aaa aac aam aan aao aas ac- aca acc acm acn aco acs ama amc amm amn amo ams an- ana anc anm ann ano ans aoa aoc aom aon aoo aos as- asa asc asm asn aso ass c-- caa cac cam can cao cas cca ccc ccm ccn cco ccs cma cmc cmm cmn cmo cms cn- cna cnc cnm cnn cno cns co- coa coc com con coo cos csa csc csm csn cso css m-o maa mac mam man mao mas mc- mca mcc mcm mcn mco mcs mma mmc mmm mmn mmo mms mna mnc mnm mnn mno mns moa moc mom mon moo mos msa msc msm msn mso mss naa nac nam nan nao nas nca ncc ncm ncn nco ncs nma nmc nmm nmn nmo nms nna nnc nnm nnn nno nns no- noa noc nom non noo nos nsa nsc nsm nsn nso nss oaa oac oam oan oao oas oc- oca occ ocm ocn oco ocs om- oma omc omm omn omo oms on- ona onc onn ono ons oo- ooa ooc oom oon ooo oos os- osa osc osm osn oso oss saa sac sam san sao sas sca scc scm scn sco scs sma smc smm smn smo sms sna snc snm snn sno sns soa soc som son soo sos ss- ssa ssc ssm ssn sso sss