-er bbb bbe bbg bbh bbo bbr bbs be- beb bee beg beh beo ber bes bgb bge bgg bgh bgo bgr bgs bhb bhe bhg bhh bho bhr bhs bob boe bog boh boo bor bos brb bre brg brh bro brr brs bsb bse bsg bsh bso bsr bss ebb ebe ebg ebh ebo ebr ebs eeb eee eeg eeo eer ees egb ege egg egh ego egr egs ehb ehe ehg ehh eho ehr ehs eo- eob eoe eog eoh eoo eor eos erb ere erg erh ero err ers es- esb ese esg esh eso esr ess gbe gbg gbh gbo gbr gbs ge- geb gee geg geh geo ger ges ggb ggg ggh ggo ggr ggs ghb ghe ghg ghh gho ghr ghs gob goe gog goh goo gor gos grb gre grg grh gro grr grs gsb gse gsg gso gsr gss hbb hbe hbg hbh hbo hbr hbs he- heb hee heg heh heo her hes hgb hge hgg hgh hgo hgr hgs hhb hhe hhg hhh hho hhr hhs hob hoe hog hoh hoo hor hos hr- hrb hre hrg hrh hro hrr hrs hsb hse hsg hsh hsr hss ob- obb obe obg obh obo obr obs oeb oee oeg oeh oeo oer oes oge ogg ogh ogo ogs ohe ohg ohh oho ohr ohs oo- oob oog ooh ooo oor oos or- orb ore org orh oro orr ors os- osb ose osg osh oso osr oss rbb rbe rbg rbh rbo rbr rbs re- reb ree reg reh reo rer res rgb rge rgg rgh rgo rgr rgs rh- rhb rhe rhg rhh rho rhr rhs rob roe rog roh roo ror ros rrb rrg rrh rrr rrs rsb rse rsg rsh rso rsr rss sbb sbe sbg sbh sbo sbr sbs se- seb see seg seh seo ser ses sgb sge sgg sgh sgo sgr sgs sh- shb she shg shh sho shr shs sob soe sog soh soo sor sos sr- srb sre srg srh sro srr srs ss- ssb sse ssg ssh sso ssr sss