a-a a-c aaa aac aam aan aas ac- aca acc acm acn acs ama amc amm amn ams an- ana anc anm ann ans as- asa asc asm asn ass c-- caa cac cam can cas cca ccc ccm ccn ccs cma cmc cmm cmn cms cn- cna cnc cnm cnn cns csa csc csm csn css maa mac mam man mas mc- mca mcc mcm mcn mcs mma mmc mmm mmn mms mna mnc mnm mnn mns msa msc msm msn mss naa nac nam nan nas nca ncc ncm ncn ncs nma nmc nmm nmn nms nna nnc nnm nnn nns nsa nsc nsm nsn nss saa sac sam san sas sca scc scm scn scs sma smc smm smn sms sna snc snm snn sns ss- ssa ssc ssm ssn sss