-er bbb bbe bbg bbo bbr bbs be- beb bee beg beo ber bes bgb bge bgg bgo bgr bgs bjg bjj bjr bjs bob boe bog boj boo bor bos brb bre brg brj bro brr brs bsb bse bsg bsj bso bsr bss ebb ebe ebg ebj ebo ebr ebs eeb eee eeg eeo eer ees egb ege egg ego egr egs ejo eo- eob eoe eog eoo eor eos erb ere erg ero err ers es- esb ese esg eso esr ess gbe gbg gbj gbo gbr gbs ge- geb gee geg geo ger ges ggb ggg ggj ggo ggr ggs gje gjg gjr gob goe gog goo gor gos grb gre grg grj gro grr grs gsb gse gsg gsj gso gsr gss jbg jbj jbo jbr jbs jeb jee jeg jej jeo jer jes jgb jge jgo jgr jgs jjb jjg jjj jjr jjs job joe jog joj joo jor jos jrb jrg jro jrr jrs jsb jse jsg jsj jso jsr jss ob- obb obe obg obj obo obr obs oeb oee oeg oeo oer oes oge ogg ogo ogs ojb oje ojo ojs oo- oob oog ooo oor oos or- orb ore org oro orr ors os- osb ose osg osj oso osr oss rbb rbe rbg rbo rbr rbs re- reb ree reg reo rer res rgb rge rgg rgo rgr rgs rjg rjr rob roe rog roj roo ror ros rrb rrg rrr rrs rsb rse rsg rsj rso rsr rss sbb sbe sbg sbj sbo sbr sbs se- seb see seg sej seo ser ses sgb sge sgg sgo sgr sgs sjb sje sjj sjr sjs sob soe sog soj soo sor sos sr- srb sre srg srj sro srr srs ss- ssb sse ssg ssj sso ssr sss