obr obs oc- oca ocb occ ocd ocg och ocl oco ocr ocs oda odb odc odd ode odg odh odl odo odr ods oea oeb oec oed oee oeg oeh oel oeo oer oes oga ogc ogd oge ogg ogh ogl ogo ogs oha ohc ohd ohe ohg ohh ohl oho ohr ohs ola olb olc old ole olg oll olo ols oo- ooa oob ooc ood oog ooh ool ooo oor oos or- ora orb orc ord ore org orh orl oro orr ors os- osa osb osc osd ose osg osh osl oso osr oss ra- raa rab rac rad rae rag rah ral rao rar ras rba rbb rbc rbd rbe rbg rbh rbl rbo rbr rbs rca rcb rcc rcd rce rcg rch rcl rco rcr rcs rda rdb rdc rdd rde rdg rdh rdl rdo rdr rds re- rea reb rec red ree reg reh rel reo rer res rga rgb rgc rgd rge rgg rgh rgo rgr rgs rh- rha rhb rhc rhd rhe rhg rhh rhl rho rhr rhs rla rlc rld rle rlg rlh rll rlo rlr rls roa rob roc rod roe rog roh rol roo ror ros rra rrb rrc rrd rrg rrh rrl rrr rrs rsa rsb rsc rsd rse rsg rsh rsl rso rsr rss saa sab sac sad sae sag sah sal sao sar sas sba sbb sbc sbd sbe sbg sbh sbl sbo sbr sbs sca scb scc scd sce scg sch scl sco scr scs sda sdb sdc sdd sde sdg sdh sdl sdo sdr sds se- sea seb sec sed see seg seh sel seo ser ses sga sgb sgc sgd sge sgg sgh sgl sgo sgr sgs sh- sha shb shc shd she shg shh shl sho shr shs sla slb slc sld sle slg slh sll slo slr sls soa sob soc sod soe sog soh sol soo sor sos sr- sra srb src srd sre srg srh srl sro srr srs ss- ssa ssb ssc ssd sse ssg ssh ssl sso ssr sss