-er -ey bbb bbc bbe bbf bbh bbk bbo bbr bby bcb bcc bce bcf bch bck bco bcr bcy be- beb bec bee bef beh bek beo ber bey bfb bfc bfe bff bfh bfo bfr bfy bhb bhc bhe bhf bhh bhk bho bhr bkb bkc bke bkf bkk bko bkr bob boc boe bof boh bok boo bor boy brb bre brf brh brk bro brr bry by- byc bye byf byh byk byo byr c-- cbb cbc cbe cbf cbh cbk cbo cbr cby ccb ccc cce ccf cch cck cco ccr ce- ceb cec cee cef ceh cek ceo cer cey cfb cfc cfe cff cfh cfk cfo cfr ch- chb chc che chf chh chk cho chr chy ckb ckc ckh cko cky co- cob coc coe cof coh cok coo cor coy crb crc cre crf crh crk cro crr cry cyb cyc cye cyf cyk cyo cyr ebb ebc ebe ebf ebh ebk ebo ebr eby ec- ecb ecc ece ecf ech eck eco ecr eeb eec eee eef eek eeo eer eey ef- efb efc efe eff efh efo efr ehb ehc ehe ehf ehh eho ehr ekb ekc eke ekf ekh eko ekr eky eo- eob eoc eoe eof eoh eok eoo eor erb erc ere erf erh erk ero err ery eyc eye eyo eyr fbb fbc fbe fbf fbh fbk fbo fbr fcb fcc fce fcf fck fco fcr fcy feb fec fee fef feh fek feo fer fey ffc ffe fff ffh ffk ffo ffr ffy fhb fhc fhe fhf fhh fho fhr fkb fkc fkf fkk fob foc foe fof foh fok foo for foy frb frc fre frf frh frk fro frr fry fy- fyb fyc fye fyk fyo hbb hbc hbe hbf hbh hbk hbo hbr hby hcb hcc hce hcf hch hck hco hcr hcy he- heb hec hee hef heh hek heo her hey hfb hfc hfe hff hfh hfk hfo hfr hfy hhb hhc hhe hhf hhh hhk hho hhr hhy hkb hkf hkh hkk hko hkr hob hoc hoe hof hoh hok hoo hor hoy hr- hrb hrc hre hrf hrh hrk hro hrr hy- hyb hyc hye hyh hyo hyr hyy kbb kbc kbe kbf kbh kbk kbo kbr kcb kcc kce kch kck kcr ke- keb kec kee kef keh kek keo ker key kfc kff kfh kfo khe khf khh khk kho khr kkb kkc kke kkh kkk kkr kky kob koc koe kof koh kok koo kor koy krc krf krk kro krr kry kyc kye kyo kyr ob- obb obc obe obf obh obk obo obr oby oc- ocb occ ocf och ock oco ocr oeb oec oee oef oeh oeo oer oey of- ofb ofc ofe off ofo ofr ohc ohe ohf ohh oho ohr okb okc oke okk oko okr oo- oob ooc oof ooh ook ooo oor or- orb orc ore orf orh ork oro orr ory oye oyo rbb rbc rbe rbf rbh rbk rbo rbr rcb rcc rce rcf rch rco rcr re- reb rec ree ref reh rek reo rer rey rfb rfc rfe rff rfh rfk rfo rfr rh- rhb rhc rhe rhf rhh rho rhr rkb rkc rke rkf rkk rko rky rob roc roe rof roh rok roo ror roy rrb rrc rrf rrh rrk rrr ry- ryc rye ryf ryk ryo ryr ryy ybc ybe ybf ybr yby ycc yce ycf ych yco ycy yeb yec yee yef yeh yek yeo yer yey yfc yfe yff yfr yhc yhe ykk yob yoc yoe yof yok yoo yor yoy yrc yre yrf yro yyb yyc yye yyf yyy