-ey c-- ccc ccd cce cco ccs cct cdc cdd cde cdo cds cdt cdy ce- cec ced cee ceo ces cet cey co- coc cod coe coo cos cot coy csc csd cse cso css cst csy ctc ctd cte cto cts ctt cty cyc cyd cye cyo cys cyt dcc dcd dce dco dcs dct ddc ddd dde ddo dds ddt ddy de- dec ded dee deo des det dey doc dod doe doo dos dot doy dsc dsd dse dso dss dst dsy dtc dtd dte dto dts dtt dty dy- dyc dyd dye dyo dys dyy ec- ecc ecd ece eco ecs ect ed- edc edd ede edo eds edt edy eec eed eee eeo ees eet eey eo- eoc eod eoe eoo eos eot es- esc esd ese eso ess est esy etc etd ete eto ets ett ety eyc eyd eye eyo eys eyt oc- occ ocd oco ocs oct odc odd ode odo ods odt oec oed oee oeo oes oet oey oo- ooc ood ooo oos oot os- osc osd ose oso oss ost ot- otc otd ote oto ots ott oyd oye oyo oys scc scd sce sco scs sct sdc sdd sde sdo sds sdt sdy se- sec sed see seo ses set sey soc sod soe soo sos sot soy ss- ssc ssd sse sso sss sst stc std ste sto sts stt sty sy- syc syd sye sys syt tcc tcd tce tco tcs tct tdc tdd tde tdo tds tdt tdy te- tec ted tee teo tes tet tey to- toc tod toe too tos tot toy tsc tsd tse tso tss tst tsy ttc ttd tte tto tts ttt tty tyc tyd tye tyo tys tyt ycc ycd yce yco ycs ycy yde ydo yds ydt ydy yec yed yee yeo yes yet yey yoc yod yoe yoo yos yot yoy ysc yse yso yss yst ysy ytc ytd yte yto yts ytt yyc yye yys yyt yyy