c-- ccc cco ccr ccs ccu co- coc coo cor cos cou coy crc cro crr crs cru cry csc cso csr css csu csy cuc cuo cur cus cuu cuy cyc cyo cyr cys oc- occ oco ocr ocs ocu oo- ooc ooo oor oos or- orc oro orr ors oru ory os- osc oso osr oss osu ou- ouc ouo our ous oyo oys rcc rco rcr rcs rcu roc roo ror ros rou roy rrc rrr rrs rru rsc rso rsr rss rsu ruc ruo rur rus ruu ruy ry- ryc ryo ryr rys ryu ryy scc sco scr scs scu soc soo sor sos sou soy sr- src sro srr srs sry ss- ssc sso ssr sss ssu suc suo sur sus suu suy sy- syc syr sys syu ucc uco ucr ucs ucu uoc uoo uor uos ur- urc uro urr urs uru ury usc uso usr uss usu uuc uur uus uuu uyc uyo uys uyu ycc yco ycs ycu ycy yoc yoo yor yos you yoy yrc yro yrs yru ysc yso ysr yss ysu ysy yuo yur yus yuu yuy yyc yys yyu yyy