-er -ey bbb bbc bbe bbn bbo bbr bbt bby bcb bcc bce bcn bco bcr bct bcy be- beb bec bee ben beo ber bet bey bnb bnc bne bnn bno bnr bnt bob boc boe bon boo bor bot boy brb bre brn bro brr brt bry btb btc bte btn bto btr btt bty by- byc bye byn byo byr byt c-- cbb cbc cbe cbn cbo cbr cbt cby ccb ccc cce ccn cco ccr cct ce- ceb cec cee cen ceo cer cet cey cn- cnb cnc cne cnn cno cnr cnt cny co- cob coc coe con coo cor cot coy crb crc cre crn cro crr crt cry ctb ctc cte ctn cto ctr ctt cty cyb cyc cye cyn cyo cyr cyt ebb ebc ebe ebn ebo ebr ebt eby ec- ecb ecc ece ecn eco ecr ect eeb eec eee een eeo eer eet eey en- enb enc ene enn eno enr ent eny eo- eob eoc eoe eon eoo eor eot erb erc ere ern ero err ert ery etb etc ete etn eto etr ett ety eyc eye eyn eyo eyr eyt nbb nbc nbe nbn nbo nbr nbt ncb ncc nce ncn nco ncr nct ne- neb nec nee nen neo ner net ney nnb nnc nne nnn nno nnt no- nob noc noe non noo nor not noy nrb nrc nre nrn nro nrr nrt nry ntb ntc nte ntn nto ntr ntt nyc nye nyn nyo nyt nyy ob- obb obc obe obn obo obr obt oby oc- ocb occ ocn oco ocr oct oeb oec oee oen oeo oer oet oey on- onb onc one onn ono onr ont ony oo- oob ooc oon ooo oor oot or- orb orc ore orn oro orr ort ory ot- otb otc ote otn oto otr ott oye oyo rbb rbc rbe rbn rbo rbr rbt rcb rcc rce rcn rco rcr rct re- reb rec ree ren reo rer ret rey rnb rnc rnn rno rnr rnt rny rob roc roe ron roo ror rot roy rrb rrc rrn rrr rrt rtb rtc rte rtn rto rtr rtt rty ry- ryc rye ryn ryo ryr ryy tbb tbc tbe tbn tbo tbr tbt tcb tcc tce tcn tco tcr tct te- teb tec tee ten teo ter tet tey tnb tnc tne tnn tno tnr tnt to- tob toc toe ton too tor tot toy trb trc tre trn tro trr trt try ttb ttc tte ttn tto ttr ttt tty tyc tye tyn tyo tyr tyt ybc ybe ybr yby ycc yce yco ycy yeb yec yee yen yeo yer yet yey yne ynn yny yob yoc yoe yon yoo yor yot yoy yrc yre yrn yro yrt ytc yte ytn yto ytr ytt yyb yyc yye yyt yyy