a-a a-c a-t aaa aac aam aan aas aat aax ac- aca acc acm acn acs act acx ama amc amm amn ams amt amx an- ana anc anm ann ans ant anx as- asa asc asm asn ass ast asx at- ata atc atm atn ats att atx ax- axa axm axn axs axt axx c-- caa cac cam can cas cat cax cca ccc ccm ccn ccs cct ccx cma cmc cmm cmn cms cmt cmx cn- cna cnc cnm cnn cns cnt cnx csa csc csm csn css cst csx cta ctc ctm ctn cts ctt ctx cxc cxs cxt cxx maa mac mam man mas mat max mc- mca mcc mcm mcn mcs mct mcx mma mmc mmm mmn mms mmt mmx mna mnc mnm mnn mns mnt msa msc msm msn mss mst msx mta mtc mtm mtn mts mtt mtx mxa mxc mxn mxs naa nac nam nan nas nat nax nca ncc ncm ncn ncs nct ncx nma nmc nmm nmn nms nmt nna nnc nnm nnn nns nnt nsa nsc nsm nsn nss nst nsx nta ntc ntm ntn nts ntt ntx nxc nxt saa sac sam san sas sat sax sca scc scm scn scs sct scx sma smc smm smn sms smt smx sna snc snm snn sns snt ss- ssa ssc ssm ssn sss sst ssx sta stc stm stn sts stt stx sxc sxm sxn sxs sxt t-x taa tac tam tan tas tat tax tca tcc tcm tcn tcs tct tcx tma tmc tmm tmn tms tmt tmx tna tnc tnm tnn tns tnt tnx tsa tsc tsm tsn tss tst tsx tta ttc ttm ttn tts ttt ttx txn txs txt xaa xac xam xan xas xat xcx xma xmc xmm xms xmt xmx xna xnc xns xsa xsc xsm xss xst xtc xtm xts xtx xxx