c-- ccc ccd cco ccr ccs ccu cdc cdd cdo cdr cds cdu cdy co- coc cod coo cor cos cou coy crc crd cro crr crs cru cry csc csd cso csr css csu csy cuc cud cuo cur cus cuu cuy cyc cyd cyo cyr cys dcc dcd dco dcr dcs dcu ddc ddd ddo ddr dds ddu ddy doc dod doo dor dos dou doy drc drd dro drr drs dru dry dsc dsd dso dsr dss dsu dsy duc dud duo dur dus duy dy- dyc dyd dyo dyr dys dyu dyy oc- occ ocd oco ocr ocs ocu odc odd odo odr ods odu oo- ooc ood ooo oor oos or- orc ord oro orr ors oru ory os- osc osd oso osr oss osu ou- ouc oud ouo our ous oyd oyo oys rcc rcd rco rcr rcs rcu rdc rdd rdo rdr rds rdu rdy roc rod roo ror ros rou roy rrc rrd rrr rrs rru rsc rsd rso rsr rss rsu ruc rud ruo rur rus ruu ruy ry- ryc ryd ryo ryr rys ryu ryy scc scd sco scr scs scu sdc sdd sdo sdr sds sdu sdy soc sod soo sor sos sou soy sr- src srd sro srr srs sry ss- ssc ssd sso ssr sss ssu suc sud suo sur sus suu suy sy- syc syd syr sys syu ucc ucd uco ucr ucs ucu udc udd udo udr uds udu uoc uod uoo uor uos ur- urc urd uro urr urs uru ury usc usd uso usr uss usu uuc uur uus uuu uyc uyo uys uyu ycc ycd yco ycs ycu ycy ydo yds ydy yoc yod yoo yor yos you yoy yrc yro yrs yru ysc yso ysr yss ysu ysy yud yuo yur yus yuu yuy yyc yys yyu yyy