-er -ey c-- ccc ccd cce cco ccr ccs cdc cdd cde cdo cdr cds cdy ce- cec ced cee ceo cer ces cey co- coc cod coe coo cor cos coy crc crd cre cro crr crs cry csc csd cse cso csr css csy cyc cyd cye cyo cyr cys dcc dcd dce dco dcr dcs ddc ddd dde ddo ddr dds ddy de- dec ded dee deo der des dey doc dod doe doo dor dos doy drc drd dre dro drr drs dry dsc dsd dse dso dsr dss dsy dy- dyc dyd dye dyo dyr dys dyy ec- ecc ecd ece eco ecr ecs ed- edc edd ede edo edr eds edy eec eed eee eeo eer ees eey eo- eoc eod eoe eoo eor eos erc erd ere ero err ers ery es- esc esd ese eso esr ess esy eyc eyd eye eyo eyr eys oc- occ ocd oco ocr ocs odc odd ode odo odr ods oec oed oee oeo oer oes oey oo- ooc ood ooo oor oos or- orc ord ore oro orr ors ory os- osc osd ose oso osr oss oyd oye oyo oys rcc rcd rce rco rcr rcs rdc rdd rde rdo rdr rds rdy re- rec red ree reo rer res rey roc rod roe roo ror ros roy rrc rrd rrr rrs rsc rsd rse rso rsr rss ry- ryc ryd rye ryo ryr rys ryy scc scd sce sco scr scs sdc sdd sde sdo sdr sds sdy se- sec sed see seo ser ses sey soc sod soe soo sor sos soy sr- src srd sre sro srr srs sry ss- ssc ssd sse sso ssr sss sy- syc syd sye syr sys ycc ycd yce yco ycs ycy yde ydo yds ydy yec yed yee yeo yer yes yey yoc yod yoe yoo yor yos yoy yrc yre yro yrs ysc yse yso ysr yss ysy yyc yye yys yyy