-er -ey bbb bbc bbe bbh bbk bbo bbr bby bcb bcc bce bch bck bco bcr bcy be- beb bec bee beh bek beo ber bey bhb bhc bhe bhh bhk bho bhr bkb bkc bke bkk bko bkr bob boc boe boh bok boo bor boy brb bre brh brk bro brr bry by- byc bye byh byk byo byr c-- cbb cbc cbe cbh cbk cbo cbr cby ccb ccc cce cch cck cco ccr ce- ceb cec cee ceh cek ceo cer cey ch- chb chc che chh chk cho chr chy ckb ckc ckh cko cky co- cob coc coe coh cok coo cor coy crb crc cre crh crk cro crr cry cyb cyc cye cyk cyo cyr ebb ebc ebe ebh ebk ebo ebr eby ec- ecb ecc ece ech eck eco ecr eeb eec eee eek eeo eer eey ehb ehc ehe ehh eho ehr ekb ekc eke ekh eko ekr eky eo- eob eoc eoe eoh eok eoo eor erb erc ere erh erk ero err ery eyc eye eyo eyr hbb hbc hbe hbh hbk hbo hbr hby hcb hcc hce hch hck hco hcr hcy he- heb hec hee heh hek heo her hey hhb hhc hhe hhh hhk hho hhr hhy hkb hkh hkk hko hkr hob hoc hoe hoh hok hoo hor hoy hr- hrb hrc hre hrh hrk hro hrr hy- hyb hyc hye hyh hyo hyr hyy kbb kbc kbe kbh kbk kbo kbr kcb kcc kce kch kck kcr ke- keb kec kee keh kek keo ker key khe khh khk kho khr kkb kkc kke kkh kkk kkr kky kob koc koe koh kok koo kor koy krc krk kro krr kry kyc kye kyo kyr ob- obb obc obe obh obk obo obr oby oc- ocb occ och ock oco ocr oeb oec oee oeh oeo oer oey ohc ohe ohh oho ohr okb okc oke okk oko okr oo- oob ooc ooh ook ooo oor or- orb orc ore orh ork oro orr ory oye oyo rbb rbc rbe rbh rbk rbo rbr rcb rcc rce rch rco rcr re- reb rec ree reh rek reo rer rey rh- rhb rhc rhe rhh rho rhr rkb rkc rke rkk rko rky rob roc roe roh rok roo ror roy rrb rrc rrh rrk rrr ry- ryc rye ryk ryo ryr ryy ybc ybe ybr yby ycc yce ych yco ycy yeb yec yee yeh yek yeo yer yey yhc yhe ykk yob yoc yoe yok yoo yor yoy yrc yre yro yyb yyc yye yyy