-er -ey b-u bbb bbc bbd bbe bbo bbr bbu bby bcb bcc bcd bce bco bcr bcu bcy bdb bdc bdd bde bdo bdr bdu bdy be- beb bec bed bee beo ber beu bey bob boc bod boe boo bor bou boy brb brd bre bro brr bru bry bub buc bud bue buo bur buu buy by- byc byd bye byo byr byu c-- cbb cbc cbd cbe cbo cbr cbu cby ccb ccc ccd cce cco ccr ccu cdb cdc cdd cde cdo cdr cdu cdy ce- ceb cec ced cee ceo cer ceu cey co- cob coc cod coe coo cor cou coy crb crc crd cre cro crr cru cry cub cuc cud cue cuo cur cuu cuy cyb cyc cyd cye cyo cyr dbb dbc dbd dbe dbo dbr dbu dby dcb dcc dcd dce dco dcr dcu ddb ddc ddd dde ddo ddr ddu ddy de- deb dec ded dee deo der deu dey dob doc dod doe doo dor dou doy drb drc drd dre dro drr dru dry dub duc dud due duo dur duy dy- dyb dyc dyd dye dyo dyr dyu dyy ebb ebc ebd ebe ebo ebr ebu eby ec- ecb ecc ecd ece eco ecr ecu ed- edb edc edd ede edo edr edu edy eeb eec eed eee eeo eer eey eo- eob eoc eod eoe eoo eor eou erb erc erd ere ero err eru ery eu- eub euc eud eue eur eyc eyd eye eyo eyr ob- obb obc obd obe obo obr obu oby oc- ocb occ ocd oco ocr ocu odb odc odd ode odo odr odu oeb oec oed oee oeo oer oey oo- oob ooc ood ooo oor or- orb orc ord ore oro orr oru ory ou- ouc oud oue ouo our oyd oye oyo rbb rbc rbd rbe rbo rbr rbu rcb rcc rcd rce rco rcr rcu rdb rdc rdd rde rdo rdr rdu rdy re- reb rec red ree reo rer reu rey rob roc rod roe roo ror rou roy rrb rrc rrd rrr rru rub ruc rud rue ruo rur ruu ruy ry- ryc ryd rye ryo ryr ryu ryy ubb ubc ube ubo ubr ubu uby ucb ucc ucd uce uco ucr ucu udb udc udd ude udo udr udu ueb uec ued uee uer uey uob uoc uod uoe uoo uor ur- urb urc urd ure uro urr uru ury uuc uue uur uuu uyc uyo uyu ybc ybe ybr yby ycc ycd yce yco ycu ycy yde ydo ydy yeb yec yed yee yeo yer yey yob yoc yod yoe yoo yor you yoy yrc yre yro yru yud yue yuo yur yuu yuy yyb yyc yye yyu yyy