prii pris pro- prob proc prog proo prop pros prps prri prrs prsc prsi prso prss psbr psci psco psgi psgr pshc pshs psip psis psoc psoi psos psph pspi pspp pspr psps psrp pssc psso rbbb rbbr rbbs rbgh rbhs rbis rboh rbsp rbss rcbc rcbo rccb rccc rccs rcgc rchb rchs rcic rcis rcos rcpi rcpo rcps rcrg rcsc rcsi rcss rgbi rghs rhbg rhcg rhcp rhhs rhib rhio rhob rhoc rhog rhoh rhos rib- ribo ribs ricc rich rico rics rigg righ rigi rigo rigs riho rihs riis rios ripi ripp ripr rips riri rirs risc rish risi riso risp riss rob- robb robi robo robs rocc roch roco rocs rogg rogh rogi rogo rohr rohs roig roio roir rois roob roog rooi roop roor roos ropo rops rorc rori roro rosc rosh rosi roso rosp ross rpcs rpgs rpho rphs rpii rpob rpos rpps rrhs rrrr rrsp rsbi rscc rsch rscs rsgb rsgc rshs rsis rsos rspb rspo rsps s-ib s-ic s-ii s-os sbbs sbcc sbcs sbhc sbhs sbic sbig sbor sbsi sbsp scbi sccc sccp sccs scgp scgs sch- schh schi scho schr schs sci- scic scio scip scir scis scob scog scoh scoo scop scor scpb scpi scpo scps scr- scrc scri scrs scsc scsh scsi scso scsr sgcb sgcg sggg sggs sghc sghs sgic sgio sgps sgro sgsh sgss shbs shcc shcp shgc shgr shhh shhs shib shig shih shii shio ship shir shis shog shoo shop shor shos shpg shps shri shrp shrs shsc sibc sibi sibo sibs sicc sich sici sico sicp sics sigg sigh sigi sigo sigs sihi sihr sihs siop sior sios sipc sipi sipo sipp sips sirc siri siro sirp sirr sirs sisc sish sisi siss sobo sobp sobr sobs soch soci soco socr socs sogh sogi sogo sogs sohh soho sohp sohs soic soir sois soog soop soor soos soph sopi sopo sopp sops sorb sorg sorh sori soro sorr sors sosh sosi soso soss spcc spco spcs spgb sphr sphs spib spic spig spio spip spir spis spoc spoo spop spor spos spps spri spro sprs spso spsp spss srbc srcc srch srgb srhs srib sris sros srpc srps srsp ssbr sscc ssci sscp sscs ssgs sshs ssis ssoc ssop sspc sspo ssps ssrc ssrg ssri ssrs sssb sssc sssh sssi ssss