-er -ey b-u bbb bbd bbe bbo bbr bbt bbu bby bdb bdd bde bdo bdr bdt bdu bdy be- beb bed bee beo ber bet beu bey bob bod boe boo bor bot bou boy brb brd bre bro brr brt bru bry btb btd bte bto btr btt btu bty bub bud bue buo bur but buu buy by- byd bye byo byr byt byu dbb dbd dbe dbo dbr dbt dbu dby ddb ddd dde ddo ddr ddt ddu ddy de- deb ded dee deo der det deu dey dob dod doe doo dor dot dou doy drb drd dre dro drr drt dru dry dtb dtd dte dto dtr dtt dtu dty dub dud due duo dur dut duy dy- dyb dyd dye dyo dyr dyu dyy ebb ebd ebe ebo ebr ebt ebu eby ed- edb edd ede edo edr edt edu edy eeb eed eee eeo eer eet eey eo- eob eod eoe eoo eor eot eou erb erd ere ero err ert eru ery etb etd ete eto etr ett etu ety eu- eub eud eue eur eut eyd eye eyo eyr eyt ob- obb obd obe obo obr obt obu oby odb odd ode odo odr odt odu oeb oed oee oeo oer oet oey oo- oob ood ooo oor oot or- orb ord ore oro orr ort oru ory ot- otb otd ote oto otr ott otu ou- oud oue ouo our out oyd oye oyo rbb rbd rbe rbo rbr rbt rbu rdb rdd rde rdo rdr rdt rdu rdy re- reb red ree reo rer ret reu rey rob rod roe roo ror rot rou roy rrb rrd rrr rrt rru rtb rtd rte rto rtr rtt rtu rty rub rud rue ruo rur rut ruu ruy ry- ryd rye ryo ryr ryu ryy tbb tbd tbe tbo tbr tbt tbu tdb tdd tde tdo tdr tdt tdu tdy te- teb ted tee teo ter tet teu tey to- tob tod toe too tor tot tou toy trb trd tre tro trr trt tru try ttb ttd tte tto ttr ttt ttu tty tub tud tue tuo tur tut tuu tuy tyd tye tyo tyr tyt ubb ube ubo ubr ubt ubu uby udb udd ude udo udr udt udu ueb ued uee uer uet uey uob uod uoe uoo uor uot ur- urb urd ure uro urr urt uru ury utb utd ute uto utr utt utu uty uue uur uut uuu uyo uyu ybe ybr yby yde ydo ydt ydy yeb yed yee yeo yer yet yey yob yod yoe yoo yor yot you yoy yre yro yrt yru ytd yte yto ytr ytt ytu yud yue yuo yur yut yuu yuy yyb yye yyt yyu yyy