c-- ccc ccd ccm ccn ccs cct cdc cdd cdm cdn cds cdt cmc cmd cmm cmn cms cmt cn- cnc cnd cnm cnn cns cnt csc csd csm csn css cst ctc ctd ctm ctn cts ctt dcc dcd dcm dcn dcs dct ddc ddd ddm ddn dds ddt dmc dmd dmm dmn dms dmt dnc dnd dnm dnn dns dnt dsc dsd dsm dsn dss dst dtc dtd dtm dtn dts dtt mc- mcc mcd mcm mcn mcs mct mdc mdd mdm mdn mds mdt mmc mmd mmm mmn mms mmt mnc mnm mnn mns mnt msc msd msm msn mss mst mtc mtd mtm mtn mts mtt ncc ncd ncm ncn ncs nct ndc ndd ndm ndn nds ndt nmc nmd nmm nmn nms nmt nnc nnm nnn nns nnt nsc nsd nsm nsn nss nst ntc ntd ntm ntn nts ntt scc scd scm scn scs sct sdc sdd sdm sdn sds sdt smc smd smm smn sms smt snc snd snm snn sns snt ss- ssc ssd ssm ssn sss sst stc std stm stn sts stt tcc tcd tcm tcn tcs tct tdc tdd tdm tdn tds tdt tmc tmd tmm tmn tms tmt tnc tnd tnm tnn tns tnt tsc tsd tsm tsn tss tst ttc ttd ttm ttn tts ttt