-er -ey bbb bbc bbd bbe bbo bbr bbs bby bcb bcc bcd bce bco bcr bcs bcy bdb bdc bdd bde bdo bdr bds bdy be- beb bec bed bee beo ber bes bey bob boc bod boe boo bor bos boy brb brd bre bro brr brs bry bsb bsc bsd bse bso bsr bss bsy by- byc byd bye byo byr bys c-- cbb cbc cbd cbe cbo cbr cbs cby ccb ccc ccd cce cco ccr ccs cdb cdc cdd cde cdo cdr cds cdy ce- ceb cec ced cee ceo cer ces cey co- cob coc cod coe coo cor cos coy crb crc crd cre cro crr crs cry csb csc csd cse cso csr css csy cyb cyc cyd cye cyo cyr cys dbb dbc dbd dbe dbo dbr dbs dby dcb dcc dcd dce dco dcr dcs ddb ddc ddd dde ddo ddr dds ddy de- deb dec ded dee deo der des dey dob doc dod doe doo dor dos doy drb drc drd dre dro drr drs dry dsb dsc dsd dse dso dsr dss dsy dy- dyb dyc dyd dye dyo dyr dys dyy ebb ebc ebd ebe ebo ebr ebs eby ec- ecb ecc ecd ece eco ecr ecs ed- edb edc edd ede edo edr eds edy eeb eec eed eee eeo eer ees eey eo- eob eoc eod eoe eoo eor eos erb erc erd ere ero err ers ery es- esb esc esd ese eso esr ess esy eyc eyd eye eyo eyr eys ob- obb obc obd obe obo obr obs oby oc- ocb occ ocd oco ocr ocs odb odc odd ode odo odr ods oeb oec oed oee oeo oer oes oey oo- oob ooc ood ooo oor oos or- orb orc ord ore oro orr ors ory os- osb osc osd ose oso osr oss oyd oye oyo oys rbb rbc rbd rbe rbo rbr rbs rcb rcc rcd rce rco rcr rcs rdb rdc rdd rde rdo rdr rds rdy re- reb rec red ree reo rer res rey rob roc rod roe roo ror ros roy rrb rrc rrd rrr rrs rsb rsc rsd rse rso rsr rss ry- ryc ryd rye ryo ryr rys ryy sbb sbc sbd sbe sbo sbr sbs sby scb scc scd sce sco scr scs sdb sdc sdd sde sdo sdr sds sdy se- seb sec sed see seo ser ses sey sob soc sod soe soo sor sos soy sr- srb src srd sre sro srr srs sry ss- ssb ssc ssd sse sso ssr sss sy- syb syc syd sye syr sys ybc ybe ybr ybs yby ycc ycd yce yco ycs ycy yde ydo yds ydy yeb yec yed yee yeo yer yes yey yob yoc yod yoe yoo yor yos yoy yrc yre yro yrs ysb ysc yse yso ysr yss ysy yyb yyc yye yys yyy