c-- ccc ccm cco ccs cct ccu cmc cmm cmo cms cmt cmu co- coc com coo cos cot cou csc csm cso css cst csu ctc ctm cto cts ctt ctu cuc cum cuo cus cut cuu m-o mc- mcc mcm mco mcs mct mcu mmc mmm mmo mms mmt mmu moc mom moo mos mot mou msc msm mso mss mst msu mtc mtm mto mts mtt mtu muc mum mus mut muu oc- occ ocm oco ocs oct ocu om- omc omm omo oms omt omu oo- ooc oom ooo oos oot os- osc osm oso oss ost osu ot- otc otm oto ots ott otu ou- ouc oum ouo ous out scc scm sco scs sct scu smc smm smo sms smt smu soc som soo sos sot sou ss- ssc ssm sso sss sst ssu stc stm sto sts stt stu suc sum suo sus sut suu tcc tcm tco tcs tct tcu tmc tmm tmo tms tmt tmu to- toc tom too tos tot tou tsc tsm tso tss tst tsu ttc ttm tto tts ttt ttu tuc tum tuo tus tut tuu ucc ucm uco ucs uct ucu um- umc umm umo ums umt umu uoc uom uoo uos uot usc usm uso uss ust usu utc utm uto uts utt utu uuc uum uus uut uuu