oef oeg oeh oei oen oeo oer oes of- ofa ofc ofe off ofg ofi ofn ofo ofr ofs oga ogc oge ogf ogg ogh ogi ogn ogo ogs oha ohc ohe ohf ohg ohh ohi ohn oho ohr ohs oia oic oie oif oii oin oio oir ois on- ona onc one onf ong onh oni onn ono onr ons oo- ooa ooc oof oog ooh ooi oon ooo oor oos or- ora orc ore orf org orh ori orn oro orr ors os- osa osc ose osf osg osh osi osn oso osr oss ra- raa rac rae raf rag rah rai ran rao rar ras rca rcc rce rcf rcg rch rci rcn rco rcr rcs re- rea rec ree ref reg reh rei ren reo rer res rfa rfc rfe rff rfg rfh rfi rfn rfo rfr rfs rga rgc rge rgf rgg rgh rgi rgn rgo rgr rgs rh- rha rhc rhe rhf rhg rhh rhi rhn rho rhr rhs ria ric rie rif rig rih rii rin rio rir ris rna rnc rng rnh rni rnn rno rnr rns roa roc roe rof rog roh roi ron roo ror ros rra rrc rrf rrg rrh rri rrn rrr rrs rsa rsc rse rsf rsg rsh rsi rsn rso rsr rss saa sac sae saf sag sah sai san sao sar sas sca scc sce scf scg sch sci scn sco scr scs se- sea sec see sef seg seh sei sen seo ser ses sfa sfc sfe sff sfg sfh sfi sfn sfo sfr sfs sga sgc sge sgf sgg sgh sgi sgn sgo sgr sgs sh- sha shc she shf shg shh shi shn sho shr shs sia sic sie sif sig sih sii sin sio sir sis sna snc sne snf sng sni snn sno snr sns soa soc soe sof sog soh soi son soo sor sos sr- sra src sre srf srg srh sri srn sro srr srs ss- ssa ssc sse ssf ssg ssh ssi ssn sso ssr sss