-er -ey c-- ccc ccd cce ccr ccs cdc cdd cde cdr cds cdy ce- cec ced cee cer ces cey crc crd cre crr crs cry csc csd cse csr css csy cyc cyd cye cyr cys dcc dcd dce dcr dcs ddc ddd dde ddr dds ddy de- dec ded dee der des dey drc drd dre drr drs dry dsc dsd dse dsr dss dsy dy- dyc dyd dye dyr dys dyy ec- ecc ecd ece ecr ecs ed- edc edd ede edr eds edy eec eed eee eer ees eey erc erd ere err ers ery es- esc esd ese esr ess esy eyc eyd eye eyr eys rcc rcd rce rcr rcs rdc rdd rde rdr rds rdy re- rec red ree rer res rey rrc rrd rrr rrs rsc rsd rse rsr rss ry- ryc ryd rye ryr rys ryy scc scd sce scr scs sdc sdd sde sdr sds sdy se- sec sed see ser ses sey sr- src srd sre srr srs sry ss- ssc ssd sse ssr sss sy- syc syd sye syr sys ycc ycd yce ycs ycy yde yds ydy yec yed yee yer yes yey yrc yre yrs ysc yse ysr yss ysy yyc yye yys yyy