a-a aaa aad aam aan aas aax ad- ada add adm adn ads adx ama amd amm amn ams amx an- ana and anm ann ans anx as- asa asd asm asn ass asx ax- axa axm axn axs axx daa dad dam dan das dax dda ddd ddm ddn dds ddx dma dmd dmm dmn dms dmx dna dnd dnm dnn dns dsa dsd dsm dsn dss dsx dxd dxn dxs dxx maa mad mam man mas max mda mdd mdm mdn mds mdx mma mmd mmm mmn mms mmx mna mnm mnn mns msa msd msm msn mss msx mxa mxd mxn mxs naa nad nam nan nas nax nda ndd ndm ndn nds nma nmd nmm nmn nms nna nnm nnn nns nsa nsd nsm nsn nss nsx nxd saa sad sam san sas sax sda sdd sdm sdn sds sma smd smm smn sms smx sna snd snm snn sns ss- ssa ssd ssm ssn sss ssx sxm sxn sxs xaa xad xam xan xas xda xdm xds xma xmd xmm xms xmx xna xns xsa xsm xss xxx