-er -ey bbb bbc bbd bbe bbo bbr bby bcb bcc bcd bce bco bcr bcy bdb bdc bdd bde bdo bdr bdy be- beb bec bed bee beo ber bey bob boc bod boe boo bor boy brb brd bre bro brr bry by- byc byd bye byo byr c-- cbb cbc cbd cbe cbo cbr cby ccb ccc ccd cce cco ccr cdb cdc cdd cde cdo cdr cdy ce- ceb cec ced cee ceo cer cey co- cob coc cod coe coo cor coy crb crc crd cre cro crr cry cyb cyc cyd cye cyo cyr dbb dbc dbd dbe dbo dbr dby dcb dcc dcd dce dco dcr ddb ddc ddd dde ddo ddr ddy de- deb dec ded dee deo der dey dob doc dod doe doo dor doy drb drc drd dre dro drr dry dy- dyb dyc dyd dye dyo dyr dyy ebb ebc ebd ebe ebo ebr eby ec- ecb ecc ecd ece eco ecr ed- edb edc edd ede edo edr edy eeb eec eed eee eeo eer eey eo- eob eoc eod eoe eoo eor erb erc erd ere ero err ery eyc eyd eye eyo eyr ob- obb obc obd obe obo obr oby oc- ocb occ ocd oco ocr odb odc odd ode odo odr oeb oec oed oee oeo oer oey oo- oob ooc ood ooo oor or- orb orc ord ore oro orr ory oyd oye oyo rbb rbc rbd rbe rbo rbr rcb rcc rcd rce rco rcr rdb rdc rdd rde rdo rdr rdy re- reb rec red ree reo rer rey rob roc rod roe roo ror roy rrb rrc rrd rrr ry- ryc ryd rye ryo ryr ryy ybc ybe ybr yby ycc ycd yce yco ycy yde ydo ydy yeb yec yed yee yeo yer yey yob yoc yod yoe yoo yor yoy yrc yre yro yyb yyc yye yyy