a-a aaa aam aan aas aax ama amm amn ams amx an- ana anm ann ans anx as- asa asm asn ass asx ax- axa axm axn axs axx maa mam man mas max mma mmm mmn mms mmx mna mnm mnn mns msa msm msn mss msx mxa mxn mxs naa nam nan nas nax nma nmm nmn nms nna nnm nnn nns nsa nsm nsn nss nsx saa sam san sas sax sma smm smn sms smx sna snm snn sns ss- ssa ssm ssn sss ssx sxm sxn sxs xaa xam xan xas xma xmm xms xmx xna xns xsa xsm xss xxx