-er -ey c-- ccc ccd cce ccr ccs ccu cdc cdd cde cdr cds cdu cdy ce- cec ced cee cer ces ceu cey crc crd cre crr crs cru cry csc csd cse csr css csu csy cuc cud cue cur cus cuu cuy cyc cyd cye cyr cys dcc dcd dce dcr dcs dcu ddc ddd dde ddr dds ddu ddy de- dec ded dee der des deu dey drc drd dre drr drs dru dry dsc dsd dse dsr dss dsu dsy duc dud due dur dus duy dy- dyc dyd dye dyr dys dyu dyy ec- ecc ecd ece ecr ecs ecu ed- edc edd ede edr eds edu edy eec eed eee eer ees eey erc erd ere err ers eru ery es- esc esd ese esr ess esu esy eu- euc eud eue eur eus eyc eyd eye eyr eys rcc rcd rce rcr rcs rcu rdc rdd rde rdr rds rdu rdy re- rec red ree rer res reu rey rrc rrd rrr rrs rru rsc rsd rse rsr rss rsu ruc rud rue rur rus ruu ruy ry- ryc ryd rye ryr rys ryu ryy scc scd sce scr scs scu sdc sdd sde sdr sds sdu sdy se- sec sed see ser ses seu sey sr- src srd sre srr srs sry ss- ssc ssd sse ssr sss ssu suc sud sue sur sus suu suy sy- syc syd sye syr sys syu ucc ucd uce ucr ucs ucu udc udd ude udr uds udu uec ued uee uer ues uey ur- urc urd ure urr urs uru ury usc usd use usr uss usu uuc uue uur uus uuu uyc uys uyu ycc ycd yce ycs ycu ycy yde yds ydy yec yed yee yer yes yey yrc yre yrs yru ysc yse ysr yss ysu ysy yud yue yur yus yuu yuy yyc yye yys yyu yyy