a-a a-c aaa aac aae aam aan aas ac- aca acc ace acm acn acs aea aec aee aem aen aes ama amc ame amm amn ams an- ana anc ane anm ann ans as- asa asc ase asm asn ass c-- caa cac cae cam can cas cca ccc cce ccm ccn ccs ce- cea cec cee cem cen ces cma cmc cme cmm cmn cms cn- cna cnc cne cnm cnn cns csa csc cse csm csn css eaa eac eae eam ean eas ec- eca ecc ece ecm ecn ecs eea eec eee eem een ees em- ema emc eme emm emn ems en- ena enc ene enm enn ens es- esa esc ese esm esn ess maa mac mae mam man mas mc- mca mcc mce mcm mcn mcs mea mec mee mem men mes mma mmc mme mmm mmn mms mna mnc mne mnm mnn mns msa msc mse msm msn mss naa nac nae nam nan nas nca ncc nce ncm ncn ncs ne- nea nec nee nem nen nes nma nmc nme nmm nmn nms nna nnc nne nnm nnn nns nsa nsc nse nsm nsn nss saa sac sae sam san sas sca scc sce scm scn scs se- sea sec see sem sen ses sma smc sme smm smn sms sna snc sne snm snn sns ss- ssa ssc sse ssm ssn sss