c-- ccc ccd cck ccm cco ccr ccu cdc cdd cdk cdm cdo cdr cdu ckc ckd ckm cko cmc cmd cmk cmm cmo cmr cmu co- coc cod cok com coo cor cou crc crd crk crm cro crr cru cuc cud cuk cum cuo cur cuu dcc dcd dck dcm dco dcr dcu ddc ddd ddk ddm ddo ddr ddu dkc dkk dkm dko dkr dku dmc dmd dmk dmm dmo dmr dmu doc dod dok dom doo dor dou drc drd drk drm dro drr dru duc dud duk dum duo dur kcc kcd kck kcm kcr kcu kdc kdk kdm kdo kdr kdu kkc kkk kkm kkr kku kmc kmd kmk kmm kmo kmu koc kod kok kom koo kor kou krc krd krk kro krr kru kuc kud kuk kum kur kuu m-o m-r mc- mcc mcd mck mcm mco mcr mcu mdc mdd mdk mdm mdo mdr mdu mkc mkd mkk mkm mko mkr mku mmc mmd mmk mmm mmo mmr mmu moc mod mok mom moo mor mou mrc mrd mrk mrm mro mrr mru muc mud muk mum mur muu oc- occ ocd ock ocm oco ocr ocu odc odd odm odo odr odu okc okd okk oko okr oku om- omc omd omm omo omr omu oo- ooc ood ook oom ooo oor or- orc ord ork orm oro orr oru ou- ouc oud ouk oum ouo our rcc rcd rcm rco rcr rcu rdc rdd rdm rdo rdr rdu rkc rkk rkm rko rku rmc rmd rmm rmo rmr roc rod rok rom roo ror rou rrc rrd rrk rrm rrr rru ruc rud ruk rum ruo rur ruu ucc ucd uck ucm uco ucr ucu udc udd udk udm udo udr udu ukc ukk ukr uku um- umc umd umm umo umr umu uoc uod uok uom uoo uor ur- urc urd urk urm uro urr uru uuc uum uur uuu