obos obri obro obsr obss ocbc occc occi ocis oclc ocml ocms ocom ocos ocrl ocro ocrr ocrs ogb oggi ogli ogml ogog ogoi ogri ogro ogsi ogsm oici oigo oiii oils oimb oios oisc oism olbo olcc olgc olgr olib olic olig olim olio olis olli ollo olmi olmo olms olog olom olor olos olsi ombo omic omim omio omis omo- omoi omoo omor omri omro omsi oobi oocr oolo ooms oooo ooos oosi orbb orbi orbo orbs orci orco orcs orgo orgs ori- oric orig oril orio oris orlo ormo oro- orom oror oros orri orro orrs orsi orso oscc osci oscl osco osgi osii osim osis osli oslo osm- osmo osoi osoo osor osos osro ossb ossi osso rbbb rbbr rbbs rbcl rbis rbms rbsl rbss rcbc rcbo rccb rccc rccs rcgc rcic rcis rcls rcms rcos rcrg rcsc rcsi rcsl rcss rgbi rib- ribo ribs ricc rico rics rigg rigi rigo rigs riis rill rilo rimi rimm rimo rims riol riom rios riri rirs risc risi rism riso riss rlcg rlcs rlls rlml rlms rmbs rmll rmrg rmsc rob- robb robi robo robs rocc roco rocs rogg rogi rogo roig roil roio roir rois roll rolm rolo romb romi romm romo roms roob roog rooi rool room roor roos rorc rori roro rosc rosi roso ross rrmc rrrr rsbi rscc rscs rsgb rsgc rsis rslc rsmg rsml rsos rssl s-ib s-ic s-ii s-os sbbs sbcc sbcs sbic sbig sbmc sbml sbor sbsi scbi sccc sccl sccm sccs scgs sci- scic scil scim scio scir scis scl- sclc sclm scls scmc scmm scmo scms scob scog scol scom scoo scor scr- scrc scri scrs scsc scsi scsl scso scsr sgcb sgcg sggg sggs sgic sgio sglr sgls sgml sgro sgsm sgss sibc sibi sibo sibs sicc sici sicm sico sics sigg sigi sigo sigs siim sil- silc sili sill silo sils simi simm simo sims siol sior sios sirc siri siro sirr sirs sisc sisi siss sl-i slcc slib slic slig slim slir sllm slmm slob sloc slog sloo slos slrc slrs slsc smbc smcc smgs smic smig smil smis smlc smls smoc smog smol smos smsc smss sobo sobr sobs soci socl socm soco socr socs sogi sogo sogs soic soil soim soir sois soli soll solo solr sols somb somi soml somm somo soog sool soom soor soos sorb sorg sori sorm soro sorr sors sosi soso soss srbc srcc srgb srib srim sris srmc sros ssbr sscc ssci sscs ssgs ssis sslc ssmc ssml ssoc ssrc ssrg ssri ssrl ssrm ssrs sssb sssc sssi sssm ssss