prri prrm prrs prsc prsi prso prss prym prys psbr psci psco psim psip psis psoc psoi psos pspi pspp pspr psps psrp pssc pssm psso psy- psys pyic pym- pyms pyo- pyos pypy pyr- pyri pyro pyry pyss rbbb rbbr rbbs rbis rbms rbsp rbss rcbc rcbo rccb rccc rccs rcic rcis rcmp rcms rcos rcpi rcpo rcps rcsc rcsi rcss rcyc rib- ribo ribs riby ricc rico rics riis rimi rimm rimo rims rimy riom rios ripi ripp ripr rips riri rirs risc risi rism riso risp riss riyo rmbs rmrp rmsc rmsp rob- robb robi robo robs roby rocc roco rocs roio roir rois romb romi romm romo romp roms romy roob rooi room roop roor roos ropo rops ropy rorc rori roro rory rosc rosi roso rosp ross rosy roys rpcs rpii rpms rpob rpos rpps rpyc rrmc rrmp rrrr rrsp rsbi rscc rscs rscy rsis rsos rspb rspo rsps rybp ryim ryip ryis ryob rysy s-ib s-ic s-ii s-os sbbs sbcc sbcs sbic sbmc sbor sbsi sbsp scbi sccc sccm sccp sccs sccy sci- scic scim scio scip scir scis scmc scmm scmo scmp scms scob scom scoo scop scor scpb scpi scpm scpo scps scr- scrc scri scrs scry scsc scsi scso scsr sibc sibi sibo sibs siby sicc sici sicm sico sicp sics siim simi simm simo simp sims simy siop sior sios sipc sipi sipo sipp sips sipy sirc siri siro sirp sirr sirs sisc sisi siss sisy siyi smbc smcc smcp smic smis smoc smos smoy smps smry smsc smsp smss sobo sobp sobr sobs soci socm soco socr socs socy soic soim soir sois somb somi somm somo somy soom soop soor soos sooy sopi sopo sopp sops sopy sorb sori sorm soro sorr sors sory sosi soso soss soyo soys spby spcc spco spcs spib spic spim spio spip spir spis spmi spms spoc spoo spop spor spos spoy spps spri sprm spro sprs spry spso spsp spss spy- spyr spys srbc srby srcc srib srim sris srmc sros srpc srps srsp ssbr ssby sscc ssci sscp sscs ssis ssmc ssoc ssop sspc sspo ssps ssrc ssri ssrm ssrs sssb sssc sssi sssm ssss sybo syco sycr syis sym- symi syms sypo syro syrs syry syso syss ybbs ybor ybry yccc ycsb yips yirb yirm yirr yiss ymci ymir yobi yobo yobs yomi yomo yomp yoop yopo yopy yori yoro yory yosi yoso yoyo ypcc ypir ypsi ysby ysco ysii ysop yspi ysyb yyyy