-er -ey bbb bbc bbe bbh bbo bbr bby bcb bcc bce bch bco bcr bcy be- beb bec bee beh beo ber bey bhb bhc bhe bhh bho bhr bob boc boe boh boo bor boy brb bre brh bro brr bry by- byc bye byh byo byr c-- cbb cbc cbe cbh cbo cbr cby ccb ccc cce cch cco ccr ce- ceb cec cee ceh ceo cer cey ch- chb chc che chh cho chr chy co- cob coc coe coh coo cor coy crb crc cre crh cro crr cry cyb cyc cye cyo cyr ebb ebc ebe ebh ebo ebr eby ec- ecb ecc ece ech eco ecr eeb eec eee eeo eer eey ehb ehc ehe ehh eho ehr eo- eob eoc eoe eoh eoo eor erb erc ere erh ero err ery eyc eye eyo eyr hbb hbc hbe hbh hbo hbr hby hcb hcc hce hch hco hcr hcy he- heb hec hee heh heo her hey hhb hhc hhe hhh hho hhr hhy hob hoc hoe hoh hoo hor hoy hr- hrb hrc hre hrh hro hrr hy- hyb hyc hye hyh hyo hyr hyy ob- obb obc obe obh obo obr oby oc- ocb occ och oco ocr oeb oec oee oeh oeo oer oey ohc ohe ohh oho ohr oo- oob ooc ooh ooo oor or- orb orc ore orh oro orr ory oye oyo rbb rbc rbe rbh rbo rbr rcb rcc rce rch rco rcr re- reb rec ree reh reo rer rey rh- rhb rhc rhe rhh rho rhr rob roc roe roh roo ror roy rrb rrc rrh rrr ry- ryc rye ryo ryr ryy ybc ybe ybr yby ycc yce ych yco ycy yeb yec yee yeh yeo yer yey yhc yhe yob yoc yoe yoo yor yoy yrc yre yro yyb yyc yye yyy