-er -ey bbb bbc bbe bbg bbn bbo bbr bby bcb bcc bce bcg bcn bco bcr bcy be- beb bec bee beg ben beo ber bey bgb bgc bge bgg bgn bgo bgr bnb bnc bne bng bnn bno bnr bob boc boe bog bon boo bor boy brb bre brg brn bro brr bry by- byc bye byg byn byo byr c-- cbb cbc cbe cbg cbn cbo cbr cby ccb ccc cce ccg ccn cco ccr ce- ceb cec cee ceg cen ceo cer cey cgb cgc cge cgg cgn cgo cgr cgy cn- cnb cnc cne cng cnn cno cnr cny co- cob coc coe cog con coo cor coy crb crc cre crg crn cro crr cry cyb cyc cye cyg cyn cyo cyr ebb ebc ebe ebg ebn ebo ebr eby ec- ecb ecc ece ecg ecn eco ecr eeb eec eee eeg een eeo eer eey egb egc ege egg egn ego egr egy en- enb enc ene eng enn eno enr eny eo- eob eoc eoe eog eon eoo eor erb erc ere erg ern ero err ery eyc eye eyn eyo eyr gbc gbe gbg gbn gbo gbr gby gcb gcc gce gcg gcn gco gcr ge- geb gec gee geg gen geo ger gey ggb ggc ggg ggn ggo ggr gnb gnc gne gnn gno gnr gob goc goe gog gon goo gor goy grb grc gre grg grn gro grr gry gy- gyb gye gyn gyo gyr nbb nbc nbe nbg nbn nbo nbr ncb ncc nce ncg ncn nco ncr ne- neb nec nee neg nen neo ner ney ngb ngc nge ngg ngn ngo nnb nnc nne nng nnn nno no- nob noc noe nog non noo nor noy nrb nrc nre nrg nrn nro nrr nry nyc nye nyg nyn nyo nyy ob- obb obc obe obg obn obo obr oby oc- ocb occ ocg ocn oco ocr oeb oec oee oeg oen oeo oer oey ogc oge ogg ogn ogo ogy on- onb onc one ong onn ono onr ony oo- oob ooc oog oon ooo oor or- orb orc ore org orn oro orr ory oye oyo rbb rbc rbe rbg rbn rbo rbr rcb rcc rce rcg rcn rco rcr re- reb rec ree reg ren reo rer rey rgb rgc rge rgg rgn rgo rgr rnb rnc rng rnn rno rnr rny rob roc roe rog ron roo ror roy rrb rrc rrg rrn rrr ry- ryc rye ryg ryn ryo ryr ryy ybc ybe ybg ybr yby ycc yce yco ycy yeb yec yee yeg yen yeo yer yey ygc ygo yne yng ynn yny yob yoc yoe yog yon yoo yor yoy yrc yre yrg yrn yro yyb yyc yye yyg yyy