a-a aaa aad aam aan aar aax ad- ada add adm adn adr adx ama amd amm amn amr amx an- ana and anm ann anr anx ar- ara ard arm arn arr arx ax- axa axm axn axr axx daa dad dam dan dar dax dda ddd ddm ddn ddr ddx dma dmd dmm dmn dmr dmx dna dnd dnm dnn dnr dra drd drm drn drr drx dxd dxn dxr dxx m-r maa mad mam man mar max mda mdd mdm mdn mdr mdx mma mmd mmm mmn mmr mmx mna mnm mnn mnr mra mrd mrm mrn mrr mrx mxa mxd mxn mxr naa nad nam nan nar nax nda ndd ndm ndn ndr nma nmd nmm nmn nmr nna nnm nnn nra nrd nrm nrn nrr nrx nxd ra- raa rad ram ran rar rax rda rdd rdm rdn rdr rdx rma rmd rmm rmn rmr rmx rna rnd rnm rnn rnr rra rrd rrm rrn rrr rxr xaa xad xam xan xar xda xdm xdr xma xmd xmm xmr xmx xna xrd xrx xxx