c-- ccc ccf cco ccr cct ccu cfc cff cfo cfr cft cfu co- coc cof coo cor cot cou crc crf cro crr crt cru ctc ctf cto ctr ctt ctu cuc cuf cuo cur cut cuu fcc fcf fco fcr fct fcu ffc fff ffo ffr fft ffu foc fof foo for fot fou frc frf fro frr frt fru ftc ftf fto ftr ftt ftu fuf fuo fur fut fuu oc- occ ocf oco ocr oct ocu of- ofc off ofo ofr oft ofu oo- ooc oof ooo oor oot or- orc orf oro orr ort oru ot- otc otf oto otr ott otu ou- ouc ouf ouo our out rcc rcf rco rcr rct rcu rfc rff rfo rfr rft rfu roc rof roo ror rot rou rrc rrf rrr rrt rru rtc rtf rto rtr rtt rtu ruc ruf ruo rur rut ruu tcc tcf tco tcr tct tcu tfc tff tfo tfr tft tfu to- toc tof too tor tot tou trc trf tro trr trt tru ttc ttf tto ttr ttt ttu tuc tuf tuo tur tut tuu ucc ucf uco ucr uct ucu ufc uff ufo ufr uft ufu uoc uoo uor uot ur- urc urf uro urr urt uru utc utf uto utr utt utu uuc uur uut uuu