-er -ey bbb bbc bbe bbf bbn bbo bbr bby bcb bcc bce bcf bcn bco bcr bcy be- beb bec bee bef ben beo ber bey bfb bfc bfe bff bfn bfo bfr bfy bnb bnc bne bnf bnn bno bnr bob boc boe bof bon boo bor boy brb bre brf brn bro brr bry by- byc bye byf byn byo byr c-- cbb cbc cbe cbf cbn cbo cbr cby ccb ccc cce ccf ccn cco ccr ce- ceb cec cee cef cen ceo cer cey cfb cfc cfe cff cfn cfo cfr cn- cnb cnc cne cnf cnn cno cnr cny co- cob coc coe cof con coo cor coy crb crc cre crf crn cro crr cry cyb cyc cye cyf cyn cyo cyr ebb ebc ebe ebf ebn ebo ebr eby ec- ecb ecc ece ecf ecn eco ecr eeb eec eee eef een eeo eer eey ef- efb efc efe eff efo efr en- enb enc ene enf enn eno enr eny eo- eob eoc eoe eof eon eoo eor erb erc ere erf ern ero err ery eyc eye eyn eyo eyr fbb fbc fbe fbf fbn fbo fbr fcb fcc fce fcf fcn fco fcr fcy feb fec fee fef fen feo fer fey ffc ffe fff ffn ffo ffr ffy fnb fnc fne fnf fnn fnr fob foc foe fof fon foo for foy frb frc fre frf frn fro frr fry fy- fyb fyc fye fyn fyo nbb nbc nbe nbf nbn nbo nbr ncb ncc nce ncf ncn nco ncr ne- neb nec nee nef nen neo ner ney nfb nfc nfe nff nfn nfo nfr nnb nnc nne nnf nnn nno no- nob noc noe nof non noo nor noy nrb nrc nre nrf nrn nro nrr nry nyc nye nyf nyn nyo nyy ob- obb obc obe obf obn obo obr oby oc- ocb occ ocf ocn oco ocr oeb oec oee oef oen oeo oer oey of- ofb ofc ofe off ofn ofo ofr on- onb onc one onf onn ono onr ony oo- oob ooc oof oon ooo oor or- orb orc ore orf orn oro orr ory oye oyo rbb rbc rbe rbf rbn rbo rbr rcb rcc rce rcf rcn rco rcr re- reb rec ree ref ren reo rer rey rfb rfc rfe rff rfn rfo rfr rnb rnc rnn rno rnr rny rob roc roe rof ron roo ror roy rrb rrc rrf rrn rrr ry- ryc rye ryf ryn ryo ryr ryy ybc ybe ybf ybr yby ycc yce ycf yco ycy yeb yec yee yef yen yeo yer yey yfc yfe yff yfr yne ynn yny yob yoc yoe yof yon yoo yor yoy yrc yre yrf yrn yro yyb yyc yye yyf yyy