old ole olg oli oll olo ols oo- ooa ooc ood oog ooi ool ooo oor oos or- ora orc ord ore org ori orl oro orr ors os- osa osc osd ose osg osi osj osl oso osr oss ra- raa rac rad rae rag rai raj ral rao rar ras rca rcc rcd rce rcg rci rcj rcl rco rcr rcs rda rdc rdd rde rdg rdi rdj rdl rdo rdr rds re- rea rec red ree reg rei rel reo rer res rga rgc rgd rge rgg rgi rgo rgr rgs ria ric rid rie rig rii ril rio rir ris rja rjc rjg rjr rla rlc rld rle rlg rli rll rlo rlr rls roa roc rod roe rog roi roj rol roo ror ros rra rrc rrd rrg rri rrl rrr rrs rsa rsc rsd rse rsg rsi rsj rsl rso rsr rss saa sac sad sae sag sai saj sal sao sar sas sca scc scd sce scg sci scj scl sco scr scs sda sdc sdd sde sdg sdi sdj sdl sdo sdr sds se- sea sec sed see seg sei sej sel seo ser ses sga sgc sgd sge sgg sgi sgl sgo sgr sgs sia sic sid sie sig sii sij sil sio sir sis sja sjc sjd sje sji sjj sjr sjs sla slc sld sle slg sli slj sll slo slr sls soa soc sod soe sog soi soj sol soo sor sos sr- sra src srd sre srg sri srj srl sro srr srs ss- ssa ssc ssd sse ssg ssi ssj ssl sso ssr sss