-er bbb bbe bbf bbh bbo bbr bbs be- beb bee bef beh beo ber bes bfb bfe bff bfh bfo bfr bfs bhb bhe bhf bhh bho bhr bhs bob boe bof boh boo bor bos brb bre brf brh bro brr brs bsb bse bsf bsh bso bsr bss ebb ebe ebf ebh ebo ebr ebs eeb eee eef eeo eer ees ef- efb efe eff efh efo efr efs ehb ehe ehf ehh eho ehr ehs eo- eob eoe eof eoh eoo eor eos erb ere erf erh ero err ers es- esb ese esf esh eso esr ess fbb fbe fbf fbh fbo fbr fbs feb fee fef feh feo fer fes ffe fff ffh ffo ffr ffs fhb fhe fhf fhh fho fhr fhs fob foe fof foh foo for fos frb fre frf frh fro frr frs fsb fse fsf fsh fso fsr fss hbb hbe hbf hbh hbo hbr hbs he- heb hee hef heh heo her hes hfb hfe hff hfh hfo hfr hfs hhb hhe hhf hhh hho hhr hhs hob hoe hof hoh hoo hor hos hr- hrb hre hrf hrh hro hrr hrs hsb hse hsf hsh hsr hss ob- obb obe obf obh obo obr obs oeb oee oef oeh oeo oer oes of- ofb ofe off ofo ofr ofs ohe ohf ohh oho ohr ohs oo- oob oof ooh ooo oor oos or- orb ore orf orh oro orr ors os- osb ose osf osh oso osr oss rbb rbe rbf rbh rbo rbr rbs re- reb ree ref reh reo rer res rfb rfe rff rfh rfo rfr rfs rh- rhb rhe rhf rhh rho rhr rhs rob roe rof roh roo ror ros rrb rrf rrh rrr rrs rsb rse rsf rsh rso rsr rss sbb sbe sbf sbh sbo sbr sbs se- seb see sef seh seo ser ses sfb sfe sff sfh sfo sfr sfs sh- shb she shf shh sho shr shs sob soe sof soh soo sor sos sr- srb sre srf srh sro srr srs ss- ssb sse ssf ssh sso ssr sss