-er -ey b-u bbb bbc bbe bbf bbo bbr bbu bby bcb bcc bce bcf bco bcr bcu bcy be- beb bec bee bef beo ber beu bey bfb bfc bfe bff bfo bfr bfu bfy bob boc boe bof boo bor bou boy brb bre brf bro brr bru bry bub buc bue buf buo bur buu buy by- byc bye byf byo byr byu c-- cbb cbc cbe cbf cbo cbr cbu cby ccb ccc cce ccf cco ccr ccu ce- ceb cec cee cef ceo cer ceu cey cfb cfc cfe cff cfo cfr cfu co- cob coc coe cof coo cor cou coy crb crc cre crf cro crr cru cry cub cuc cue cuf cuo cur cuu cuy cyb cyc cye cyf cyo cyr ebb ebc ebe ebf ebo ebr ebu eby ec- ecb ecc ece ecf eco ecr ecu eeb eec eee eef eeo eer eey ef- efb efc efe eff efo efr eo- eob eoc eoe eof eoo eor eou erb erc ere erf ero err eru ery eu- eub euc eue euf eur eyc eye eyo eyr fbb fbc fbe fbf fbo fbr fbu fcb fcc fce fcf fco fcr fcu fcy feb fec fee fef feo fer feu fey ffc ffe fff ffo ffr ffu ffy fob foc foe fof foo for fou foy frb frc fre frf fro frr fru fry fub fue fuf fuo fur fuu fy- fyb fyc fye fyo ob- obb obc obe obf obo obr obu oby oc- ocb occ ocf oco ocr ocu oeb oec oee oef oeo oer oey of- ofb ofc ofe off ofo ofr ofu oo- oob ooc oof ooo oor or- orb orc ore orf oro orr oru ory ou- ouc oue ouf ouo our oye oyo rbb rbc rbe rbf rbo rbr rbu rcb rcc rce rcf rco rcr rcu re- reb rec ree ref reo rer reu rey rfb rfc rfe rff rfo rfr rfu rob roc roe rof roo ror rou roy rrb rrc rrf rrr rru rub ruc rue ruf ruo rur ruu ruy ry- ryc rye ryf ryo ryr ryu ryy ubb ubc ube ubf ubo ubr ubu uby ucb ucc uce ucf uco ucr ucu ueb uec uee uef uer uey ufc ufe uff ufo ufr ufu uob uoc uoe uoo uor ur- urb urc ure urf uro urr uru ury uuc uue uur uuu uyc uyo uyu ybc ybe ybf ybr yby ycc yce ycf yco ycu ycy yeb yec yee yef yeo yer yey yfc yfe yff yfr yfu yob yoc yoe yof yoo yor you yoy yrc yre yrf yro yru yue yuo yur yuu yuy yyb yyc yye yyf yyu yyy