c-- ccc cco ccr cct ccu co- coc coo cor cot cou coy crc cro crr crt cru cry ctc cto ctr ctt ctu cty cuc cuo cur cut cuu cuy cyc cyo cyr cyt oc- occ oco ocr oct ocu oo- ooc ooo oor oot or- orc oro orr ort oru ory ot- otc oto otr ott otu ou- ouc ouo our out oyo rcc rco rcr rct rcu roc roo ror rot rou roy rrc rrr rrt rru rtc rto rtr rtt rtu rty ruc ruo rur rut ruu ruy ry- ryc ryo ryr ryu ryy tcc tco tcr tct tcu to- toc too tor tot tou toy trc tro trr trt tru try ttc tto ttr ttt ttu tty tuc tuo tur tut tuu tuy tyc tyo tyr tyt ucc uco ucr uct ucu uoc uoo uor uot ur- urc uro urr urt uru ury utc uto utr utt utu uty uuc uur uut uuu uyc uyo uyu ycc yco ycu ycy yoc yoo yor yot you yoy yrc yro yrt yru ytc yto ytr ytt ytu yuo yur yut yuu yuy yyc yyt yyu yyy