-er -ey bbb bbd bbe bbo bbr bbt bby bdb bdd bde bdo bdr bdt bdy be- beb bed bee beo ber bet bey bob bod boe boo bor bot boy brb brd bre bro brr brt bry btb btd bte bto btr btt bty by- byd bye byo byr byt dbb dbd dbe dbo dbr dbt dby ddb ddd dde ddo ddr ddt ddy de- deb ded dee deo der det dey dob dod doe doo dor dot doy drb drd dre dro drr drt dry dtb dtd dte dto dtr dtt dty dy- dyb dyd dye dyo dyr dyy ebb ebd ebe ebo ebr ebt eby ed- edb edd ede edo edr edt edy eeb eed eee eeo eer eet eey eo- eob eod eoe eoo eor eot erb erd ere ero err ert ery etb etd ete eto etr ett ety eyd eye eyo eyr eyt ob- obb obd obe obo obr obt oby odb odd ode odo odr odt oeb oed oee oeo oer oet oey oo- oob ood ooo oor oot or- orb ord ore oro orr ort ory ot- otb otd ote oto otr ott oyd oye oyo rbb rbd rbe rbo rbr rbt rdb rdd rde rdo rdr rdt rdy re- reb red ree reo rer ret rey rob rod roe roo ror rot roy rrb rrd rrr rrt rtb rtd rte rto rtr rtt rty ry- ryd rye ryo ryr ryy tbb tbd tbe tbo tbr tbt tdb tdd tde tdo tdr tdt tdy te- teb ted tee teo ter tet tey to- tob tod toe too tor tot toy trb trd tre tro trr trt try ttb ttd tte tto ttr ttt tty tyd tye tyo tyr tyt ybe ybr yby yde ydo ydt ydy yeb yed yee yeo yer yet yey yob yod yoe yoo yor yot yoy yre yro yrt ytd yte yto ytr ytt yyb yye yyt yyy