-ol c-- ccc ccd ccf cck ccl cco ccu cdc cdd cdf cdk cdl cdo cdu cfc cfd cff cfk cfl cfo cfu ckc ckd cko cl- clc cld clf clk cll clo clu co- coc cod cof cok col coo cou cuc cud cuf cuk cul cuo cuu dcc dcd dcf dck dcl dco dcu ddc ddd ddf ddk ddl ddo ddu dfc dfd dff dfk dfl dfo dfu dkc dkk dkl dko dku dl- dlc dld dlf dlk dll dlo dlu doc dod dof dok dol doo dou duc dud duf duk dul duo fcc fcd fcf fck fcl fco fcu fdc fdd fdf fdk fdl fdo fdu ffc ffd fff ffk ffl ffo ffu fkc fkf fkk fkl flc fld flf fll flo flu foc fof fok fol foo fou fud fuf fuk ful fuo fuu kcc kcd kck kcl kcu kdc kdf kdk kdl kdo kdu kfc kfd kff kfo kfu kkc kkk kkl kku kl- klc kld klf klo klu koc kod kof kok kol koo kou kuc kud kuk kul kuu lcc lcd lcf lck lcl lco lcu ldc ldd ldf ldk ldl ldo ldu lfc lfd lff lfk lfl lfo lfu lkl llc lld llf llk lll llo llu loc lod lof lok lol loo lou luc lud luf luk lul luo luu oc- occ ocd ocf ock ocl oco ocu odc odd odf odl odo odu of- ofc ofd off ofl ofo ofu okc okd okk okl oko oku olc old olf olk oll olo olu oo- ooc ood oof ook ool ooo ou- ouc oud ouf ouk oul ouo ucc ucd ucf uck ucl uco ucu udc udd udf udk udl udo udu ufc ufd uff ufl ufo ufu ukc ukf ukk ukl uku ulc uld ulf ulk ull ulo ulu uoc uod uok uol uoo uuc uuu