c-- ccc ccm ccn cco ccs cct cmc cmm cmn cmo cms cmt cn- cnc cnm cnn cno cns cnt co- coc com con coo cos cot csc csm csn cso css cst ctc ctm ctn cto cts ctt m-o mc- mcc mcm mcn mco mcs mct mmc mmm mmn mmo mms mmt mnc mnm mnn mno mns mnt moc mom mon moo mos mot msc msm msn mso mss mst mtc mtm mtn mto mts mtt ncc ncm ncn nco ncs nct nmc nmm nmn nmo nms nmt nnc nnm nnn nno nns nnt no- noc nom non noo nos not nsc nsm nsn nso nss nst ntc ntm ntn nto nts ntt oc- occ ocm ocn oco ocs oct om- omc omm omn omo oms omt on- onc onn ono ons ont oo- ooc oom oon ooo oos oot os- osc osm osn oso oss ost ot- otc otm otn oto ots ott scc scm scn sco scs sct smc smm smn smo sms smt snc snm snn sno sns snt soc som son soo sos sot ss- ssc ssm ssn sso sss sst stc stm stn sto sts stt tcc tcm tcn tco tcs tct tmc tmm tmn tmo tms tmt tnc tnm tnn tno tns tnt to- toc tom ton too tos tot tsc tsm tsn tso tss tst ttc ttm ttn tto tts ttt