a-a a-c aaa aac aam aar aas aax ac- aca acc acm acr acs acx ama amc amm amr ams amx ar- ara arc arm arr ars arx as- asa asc asm asr ass asx ax- axa axm axr axs axx c-- caa cac cam car cas cax cca ccc ccm ccr ccs ccx cma cmc cmm cmr cms cmx cra crc crm crr crs crx csa csc csm csr css csx cxc cxr cxs cxx m-r maa mac mam mar mas max mc- mca mcc mcm mcr mcs mcx mma mmc mmm mmr mms mmx mra mrc mrm mrr mrs mrx msa msc msm msr mss msx mxa mxc mxr mxs ra- raa rac ram rar ras rax rca rcc rcm rcr rcs rcx rma rmc rmm rmr rms rmx rra rrc rrm rrr rrs rsa rsc rsm rsr rss rsx rxr rxs saa sac sam sar sas sax sca scc scm scr scs scx sma smc smm smr sms smx sr- sra src srm srr srs srx ss- ssa ssc ssm ssr sss ssx sxc sxm sxs xaa xac xam xar xas xcr xcx xma xmc xmm xmr xms xmx xrc xrx xsa xsc xsm xss xxx