obbo obia obis oboi obor obos obra obri obro obsr obss ocab ocac ocas ocbc occa occc occi ocfa ocis ocos ocra ocro ocrr ocrs ocsa ofas ofcr off- offa offc offo offr offs ofor ofra oiba oici oiii oios oira oisc ooaa ooba oobi oocr ooff oofs ooia oooo ooos oora oosa oosi orab orac orai orao orar oras orba orbb orbi orbo orbs orca orci orco orcs orff orfi orfs ori- oria oric orif orio oris oro- orof oror oros orra orri orro orrs orsa orsi orso osaf osai osar osas osba osca oscc osci osco osfa osia osii osis osoi osoo osor osos osro ossa ossb ossi osso raab raaf raas raba rabb rabi rabo rabs rac- raca racc raci raco racs rafa rafc raff rafi raia raic raif raii rair rais raob raoc raos rara rarb rarf rari raro rars rasa rasc rasi raso rass rbaf rbbb rbbr rbbs rbis rbss rcac rcaf rcas rcbc rcbo rccb rccc rccs rcfc rcic rcis rcos rcsa rcsc rcsi rcss rffc rfic riaa riab riai rias rib- riba ribo ribs rica ricc rico rics rifa riff rifs riia riif riis rios riri rirs risa risc risi riso riss roab roaf roar roas rob- roba robb robi robo robs roca rocc roco rocs rofc roff rofo roia roif roio roir rois roob roof rooi roor roos rora rorc rori roro rosa rosc rosi roso ross rras rrfc rrif rrrr rsaa rsaf rsai rsbi rscc rscs rsfc rsis rsos rssa s-ib s-ic s-ii s-os sa-c saab saac saaf saar saas saba sabb sabc sabi sabo sabr sabs saca sacc saci saco sacr sacs safa safb safc saff safi safo safr saia saic saif sair sais saoi saor saos sara sarc sarf sari saro sarr sars sasa sasc sasf sasi saso sass sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sbfc sbia sbic sbor sbsa sbsi scaa scab scac scaf scai scar scas scba scbi sccc sccs scfa scfc scfi sci- scia scic scif scio scir scis scob scoo scor scr- scra scrc scri scrs scsa scsc scsi scso scsr sfar sfas sfba sfbc sfca sfcc sfco sfcs sffc sfia sfio sfor sfos sfra sfrc sfro sfss siaa siab siac siaf siai sias siba sibc sibi sibo sibs sica sicc sici sico sics sifa siff sifo sifr sior sios sira sirc sirf siri siro sirr sirs sisa sisc sisi siss soar soas soba sobo sobr sobs soca soci soco socr socs sofa sofi sofo soia soic soif soir sois soof soor soos sora sorb sori soro sorr sors sosa sosi soso soss sraf sras srbc srcc srfc srfi srib sris sros ssaa ssab ssac ssao ssas ssbr ssca sscc ssci sscs ssfc ssis ssoc ssra ssrc ssri ssrs sssa sssb sssc sssf sssi ssss