-er -ey bbb bbc bbe bbg bbh bbo bbr bby bcb bcc bce bcg bch bco bcr bcy be- beb bec bee beg beh beo ber bey bgb bgc bge bgg bgh bgo bgr bhb bhc bhe bhg bhh bho bhr bob boc boe bog boh boo bor boy brb bre brg brh bro brr bry by- byc bye byg byh byo byr c-- cbb cbc cbe cbg cbh cbo cbr cby ccb ccc cce ccg cch cco ccr ce- ceb cec cee ceg ceh ceo cer cey cgb cgc cge cgg cgh cgo cgr cgy ch- chb chc che chg chh cho chr chy co- cob coc coe cog coh coo cor coy crb crc cre crg crh cro crr cry cyb cyc cye cyg cyo cyr ebb ebc ebe ebg ebh ebo ebr eby ec- ecb ecc ece ecg ech eco ecr eeb eec eee eeg eeo eer eey egb egc ege egg egh ego egr egy ehb ehc ehe ehg ehh eho ehr eo- eob eoc eoe eog eoh eoo eor erb erc ere erg erh ero err ery eyc eye eyo eyr gbc gbe gbg gbh gbo gbr gby gcb gcc gce gcg gch gco gcr ge- geb gec gee geg geh geo ger gey ggb ggc ggg ggh ggo ggr ghb ghc ghe ghg ghh gho ghr gob goc goe gog goh goo gor goy grb grc gre grg grh gro grr gry gy- gyb gye gyo gyr hbb hbc hbe hbg hbh hbo hbr hby hcb hcc hce hcg hch hco hcr hcy he- heb hec hee heg heh heo her hey hgb hgc hge hgg hgh hgo hgr hgy hhb hhc hhe hhg hhh hho hhr hhy hob hoc hoe hog hoh hoo hor hoy hr- hrb hrc hre hrg hrh hro hrr hy- hyb hyc hye hyg hyh hyo hyr hyy ob- obb obc obe obg obh obo obr oby oc- ocb occ ocg och oco ocr oeb oec oee oeg oeh oeo oer oey ogc oge ogg ogh ogo ogy ohc ohe ohg ohh oho ohr oo- oob ooc oog ooh ooo oor or- orb orc ore org orh oro orr ory oye oyo rbb rbc rbe rbg rbh rbo rbr rcb rcc rce rcg rch rco rcr re- reb rec ree reg reh reo rer rey rgb rgc rge rgg rgh rgo rgr rh- rhb rhc rhe rhg rhh rho rhr rob roc roe rog roh roo ror roy rrb rrc rrg rrh rrr ry- ryc rye ryg ryo ryr ryy ybc ybe ybg ybr yby ycc yce ych yco ycy yeb yec yee yeg yeh yeo yer yey ygc ygo yhc yhe yob yoc yoe yog yoo yor yoy yrc yre yrg yro yyb yyc yye yyg yyy