-er -ey b-p bbb bbc bbe bbo bbp bbr bbt bby bcb bcc bce bco bcp bcr bct bcy be- beb bec bee beo bep ber bet bey bob boc boe boo bop bor bot boy bpb bpc bpe bpo bpp bpr bpt bpy brb bre bro brp brr brt bry btb btc bte bto btp btr btt bty by- byc bye byo byp byr byt c-- cbb cbc cbe cbo cbp cbr cbt cby ccb ccc cce cco ccp ccr cct ce- ceb cec cee ceo cep cer cet cey co- cob coc coe coo cop cor cot coy cpb cpc cpe cpo cpp cpr cpt crb crc cre cro crp crr crt cry ctb ctc cte cto ctp ctr ctt cty cyb cyc cye cyo cyp cyr cyt ebb ebc ebe ebo ebp ebr ebt eby ec- ecb ecc ece eco ecr ect eeb eec eee eeo eep eer eet eey eo- eob eoc eoe eoo eop eor eot ep- epb epc epe epo epp epr ept erb erc ere ero erp err ert ery etb etc ete eto etp etr ett ety eyc eye eyo eyp eyr eyt ob- obb obc obe obo obp obr obt oby oc- ocb occ oco ocp ocr oct oeb oec oee oeo oep oer oet oey oo- oob ooc ooo oop oor oot op- opb opc ope opo opp opr opt opy or- orb orc ore oro orp orr ort ory ot- otb otc ote oto otp otr ott oye oyo p-p pbb pbc pbe pbo pbp pbr pbt pby pcb pcc pce pco pcp pcr pct peb pec pee peo pep per pet pey pob poc poe poo pop por pot poy ppb ppc ppe ppo ppp ppr ppt prb prc pre pro prp prr prt pry pt- ptb ptc pte pto ptp ptr ptt pty py- pyb pyc pye pyo pyr pyt rbb rbc rbe rbo rbp rbr rbt rcb rcc rce rco rcp rcr rct re- reb rec ree reo rep rer ret rey rob roc roe roo rop ror rot roy rpb rpc rpe rpo rpp rpr rpt rrb rrc rrp rrr rrt rtb rtc rte rto rtp rtr rtt rty ry- ryc rye ryo ryr ryy tbb tbc tbe tbo tbp tbr tbt tcb tcc tce tco tcp tcr tct te- teb tec tee teo tep ter tet tey to- tob toc toe too top tor tot toy tpb tpc tpe tpo tpp tpr tpt trb trc tre tro trp trr trt try ttb ttc tte tto ttp ttr ttt tty tyc tye tyo typ tyr tyt ybc ybe ybp ybr yby ycc yce yco ycp ycy yeb yec yee yeo yep yer yet yey yob yoc yoe yoo yop yor yot yoy ypo yrc yre yro yrp yrt ytc yte yto ytp ytr ytt yyb yyc yye yyt yyy