bbbb bbbs bbng bbpr bbrg bggs bgun bnpp bnrr bnss bpsu brns brrr brrs brsb brsr brug brun brup brus bsgs bsns bspp bspr bsup bubb bubs bubu bugg bugs bunb bung bunn buns bunu bups bur- burb burg burn burp burr burs buru buss busu buus gbbs gggg ggrn ggss gnps gnrr gnus gpgp gprp gprs gpsg gpss grbr grps grrr grrs grss grub grug grun grur grus gsur gubb gubs gubu gugb gugg gugu gung gunn guns gups gurb gurg gurn gurr gurs guru gusb guss guus n-up nbpp nbps nbsp ngns ngsn ngur nguu nngn nnnn nnpr nnss npss nrpn nrps nrsp nsnr nsps nssb nssp nssr nsss nsub nubs nugs nung nunn nuns nups nurn nurp nurr nurs nuru nuss nusu pbrs pbsp pgpu pgss pgup pnpp pnup pppn pppp ppps ppru ppss ppur prbs prgs prnp prps prrs prss prus pruu psbr psgr psnr pspp pspr psps psrp pubs pubu pugs pugu pung puns punu pups pupu pur- purb purg purp purr purs puru puss rbbb rbbr rbbs rbsp rbss rnbr rngs rnsp rpgs rppn rpps rrrr rrsp rrun rsgb rsnn rsnr rspb rsps rubb rubp rubs rubu rugg rugs rung runn runs rupp rurp rurs ruru russ rusu ruun sbbs sbsp sbus sggg sggs sgps sgss snns snpg snpp snrs snub snug snur snus spgb spns spps sprs spsp spss spug spun spur spus srgb srnn srps srsp srub ssbn ssbr ssgs ssns ssps ssrg ssrs sssb ssss sub- subb subg subs sug- sugg sun- sunb sung sunn suns sunu sup- supp supr sups sur- surg surn surp surr surs suru sus- susp suss susu suus u-rp uggs ugur uguu ungp ungu unns unps unrs uns- unsg unus upnp uppp uppu upup urbs urgu urns urss ursu urun urup urur urus usbr usbs usgp usnr usnu uspp usps ussb ussr usss ussu usun usus uuuu