c-- ccc ccf cco ccr cct ccu cfc cff cfo cfr cft cfu co- coc cof coo cor cot cou coy crc crf cro crr crt cru cry ctc ctf cto ctr ctt ctu cty cuc cuf cuo cur cut cuu cuy cyc cyf cyo cyr cyt fcc fcf fco fcr fct fcu fcy ffc fff ffo ffr fft ffu ffy foc fof foo for fot fou foy frc frf fro frr frt fru fry ftc ftf fto ftr ftt ftu fty fuf fuo fur fut fuu fy- fyc fyo 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 ory ot- otc otf oto otr ott otu ou- ouc ouf ouo our out oyo rcc rcf rco rcr rct rcu rfc rff rfo rfr rft rfu roc rof roo ror rot rou roy rrc rrf rrr rrt rru rtc rtf rto rtr rtt rtu rty ruc ruf ruo rur rut ruu ruy ry- ryc ryf ryo ryr ryu ryy tcc tcf tco tcr tct tcu tfc tff tfo tfr tft tfu to- toc tof too tor tot tou toy trc trf tro trr trt tru try ttc ttf tto ttr ttt ttu tty tuc tuf tuo tur tut tuu tuy tyc tyf tyo tyr tyt ucc ucf uco ucr uct ucu ufc uff ufo ufr uft ufu uoc uoo uor uot ur- urc urf uro urr urt uru ury utc utf uto utr utt utu uty uuc uur uut uuu uyc uyo uyu ycc ycf yco ycu ycy yfc yff yfr yft yfu yoc yof yoo yor yot you yoy yrc yrf yro yrt yru ytc ytf yto ytr ytt ytu yuo yur yut yuu yuy yyc yyf yyt yyu yyy