c-- ccc ccf ccg cco ccr ccu cfc cff cfg cfo cfr cfu cgc cgg cgo cgr cgu co- coc cof cog coo cor cou crc crf crg cro crr cru cuc cuf cug cuo cur cuu fcc fcf fcg fco fcr fcu ffc fff ffg ffo ffr ffu fgc fgf fgg fgr foc fof fog foo for fou frc frf frg fro frr fru fuf fug fuo fur fuu gcc gcf gcg gco gcr gcu gfc gff gfo gfr ggc ggg ggo ggr ggu goc gof gog goo gor gou grc grf grg gro grr gru gu- guc guf gug guo gur guu oc- occ ocf ocg oco ocr ocu of- ofc off ofg ofo ofr ofu ogc ogf ogg ogo oo- ooc oof oog ooo oor or- orc orf org oro orr oru ou- ouc ouf ouo our rcc rcf rcg rco rcr rcu rfc rff rfg rfo rfr rfu rgc rgf rgg rgo rgr roc rof rog roo ror rou rrc rrf rrg rrr rru ruc ruf rug ruo rur ruu ucc ucf ucg uco ucr ucu ufc uff ufg ufo ufr ufu ugc ugf ugg ugo ugr ugu uoc uog uoo uor ur- urc urf urg uro urr uru uuc uug uur uuu