pupu pur- purb pure purg puro purp purr purs puru puss puuc rbbb rbbr rbbs rbsp rbss rcbc rcbo rccb rccc rccs rcep rcgc rcos rcpo rcps rcrg rcsc rcss rebb rebe rebo rebs rebu recc rece recp recr recs recu reeb reep rees rege rego regr regs regu reog reop reos reou repe repo repp repr reps repu rere rerg rero rers reru rese reso resp ress reue reup reus reuu rgbe rob- robb robe robo robs robu rocc roce roco rocs roeg roer roes roge rogg rogo roob roog roop roor roos rope ropo rops rorc rore roro roru rosc rose roso rosp ross roub roue roup rous rpcs rpgs rpob rpoe rpos rpps rrrr rrsp rscc rscs rsee rsgb rsgc rsos rspb rspo rsps rsre rubb rube rubp rubs rubu ruce ruer rues ruge rugg rugs rupe rupp rurc rure ruro rurp rurs ruru ruse ruso russ rusu s-os sbbs sbcc sbcs sber sbor sbse sbsp sbus sccc scce sccp sccs scec scee sceg scep scer scgp scgs scob scog scoo scop scor scpb scpe scpo scps scr- scrc scre scrs scsc scso scsr scsu scub scug scup scur se-c se-e se-g se-o se-s se-u sebe sebo sebs sec- secc sece secg seco secr secs secu seeb seec seeg seep seer sees seeu sege segg sego segs segu seoc seop sepe sepg sepo sepp sepr seps sepu serb serc sere serg sero serp serr sers seru sesc sese seso sess seur sgcb sgce sgcg sger sges sggg sggs sgps sgro sgss sobe sobo sobp sobr sobs sobu soce soco socr socs soec soeo soep soes sogo sogs soog soop soor soos sope sopo sopp sops sopu sorb sore sorg soro sorr sors soru sose soso soss soue soup sour sous spcc spco spcs speb spec spee speg sper spes spgb spoc spoo spop spor spos spps spro sprs spse spso spsp spss spue spug spur spus srbc srcc sreb srec sreo sres srgb sros srpc srps srsp srub ssbr sscc ssce sscp sscs ssec ssee ssep sses ssgs ssoc ssop sspc sspe sspo ssps ssrc ssrg ssrs sssb sssc ssss sub- subb subg subo subs suc- succ sucr sucs suee suer sues sueu sug- suge sugg sugo suor suos sup- supe supo supp supr sups sur- surc sure surg suro surp surr surs suru sus- suse suso susp suss susu suus u-rp ubbe ubbo uber uboc ubos ubpc ucbc uccp uces ucos ucpb ucrc ucsb ucsc ucsu uers uess ugcc ugcg ugeo ugep uggo uggs ugos ugro ugur uguu uocc uor- uore upbe upcs upgo upor upos uppc uppe uppp uppu upsc upse upup urbe urbs ure- ures urge urgu uro- uroo urpo urre urse urso urss ursu urup urur urus usbc usbe usbr usbs uscc usce uscg usco uscs usee user uses usgo usgp usoc usoe usog usos uspc uspo uspp usps ussb ussc usse ussr usss ussu usus uucp uuoc uuuu