a-a aaa aam aan aar aax ama amm amn amr amx an- ana anm ann anr anx ar- ara arm arn arr arx ax- axa axm axn axr axx m-r maa mam man mar max mma mmm mmn mmr mmx mna mnm mnn mnr mra mrm mrn mrr mrx mxa mxn mxr naa nam nan nar nax nma nmm nmn nmr nna nnm nnn nra nrm nrn nrr nrx ra- raa ram ran rar rax rma rmm rmn rmr rmx rna rnm rnn rnr rra rrm rrn rrr rxr xaa xam xan xar xma xmm xmr xmx xna xrx xxx