c-- ccc ccd cco ccs cct ccu cdc cdd cdo cds cdt cdu cdy co- coc cod coo cos cot cou coy csc csd cso css cst csu csy ctc ctd cto cts ctt ctu cty cuc cud cuo cus cut cuu cuy cyc cyd cyo cys cyt dcc dcd dco dcs dct dcu ddc ddd ddo dds ddt ddu ddy doc dod doo dos dot dou doy dsc dsd dso dss dst dsu dsy dtc dtd dto dts dtt dtu dty duc dud duo dus dut duy dy- dyc dyd dyo dys dyu dyy oc- occ ocd oco ocs oct ocu odc odd odo ods odt odu oo- ooc ood ooo oos oot os- osc osd oso oss ost osu ot- otc otd oto ots ott otu ou- ouc oud ouo ous out oyd oyo oys scc scd sco scs sct scu sdc sdd sdo sds sdt sdu sdy soc sod soo sos sot sou soy ss- ssc ssd sso sss sst ssu stc std sto sts stt stu sty suc sud suo sus sut suu suy sy- syc syd sys syt syu tcc tcd tco tcs tct tcu tdc tdd tdo tds tdt tdu tdy to- toc tod too tos tot tou toy tsc tsd tso tss tst tsu tsy ttc ttd tto tts ttt ttu tty tuc tud tuo tus tut tuu tuy tyc tyd tyo tys tyt ucc ucd uco ucs uct ucu udc udd udo uds udt udu uoc uod uoo uos uot usc usd uso uss ust usu utc utd uto uts utt utu uty uuc uus uut uuu uyc uyo uys uyu ycc ycd yco ycs ycu ycy ydo yds ydt ydy yoc yod yoo yos yot you yoy ysc yso yss yst ysu ysy ytc ytd yto yts ytt ytu yud yuo yus yut yuu yuy yyc yys yyt yyu yyy