c-- ccc ccm ccn ccr ccs cct cmc cmm cmn cmr cms cmt cn- cnc cnm cnn cnr cns cnt crc crm crn crr crs crt csc csm csn csr css cst ctc ctm ctn ctr cts ctt m-r mc- mcc mcm mcn mcr mcs mct mmc mmm mmn mmr mms mmt mnc mnm mnn mnr mns mnt mrc mrm mrn mrr mrs mrt msc msm msn msr mss mst mtc mtm mtn mtr mts mtt ncc ncm ncn ncr ncs nct nmc nmm nmn nmr nms nmt nnc nnm nnn nns nnt nrc nrm nrn nrr nrs nrt nsc nsm nsn nsr nss nst ntc ntm ntn ntr nts ntt rcc rcm rcn rcr rcs rct rmc rmm rmn rmr rms rmt rnc rnm rnn rnr rns rnt rrc rrm rrn rrr rrs rrt rsc rsm rsn rsr rss rst rtc rtm rtn rtr rts rtt scc scm scn scr scs sct smc smm smn smr sms smt snc snm snn snr sns snt sr- src srm srn srr srs srt ss- ssc ssm ssn ssr sss sst stc stm stn str sts stt tcc tcm tcn tcr tcs tct tmc tmm tmn tmr tms tmt tnc tnm tnn tnr tns tnt trc trm trn trr trs trt tsc tsm tsn tsr tss tst ttc ttm ttn ttr tts ttt