bbbb bbbs bnrr bnss brns brrr brrs brsb brsr brun brus bry- bryn bsns bubb bubs bubu bunb bunn buns bunu bur- burb burn burr burs buru bury buss busu busy buus buys buyu byrn bysb byss bysy byun nnnn nnss nsnr nssb nssr nsss nsub nubs nuby nunn nuns nuny nurn nurr nurs nuru nuss nusu nusy nuys nyny nyrb nyss rbbb rbbr rbbs rbss rnbr rrrr rrun rsnn rsnr rubb rubs rubu ruby runn runs runy rurs ruru russ rusu rusy ruun ruys rynn rysy ryun sbbs sbus snns snrs snsy snub snur snus snys srby srnn srub ssbn ssbr ssby ssns ssrs sssb ssss sub- subb subs sun- sunb sunn suns sunu suny sur- surn surr surs suru sury sus- suss susu susy suus suyn suyr suyu syn- syns synu syny syrs syry syss syun unns unrs uns- unus urbs urns urry urss ursu ursy urun urur urus uryn usbr usbs usnr usnu ussb ussr usss ussu ussy usun usus uuuu uuyn ybbs ybry yrun yryn ysby yssu ysyb yubu yuns yuny yurn yury yuyu yyyy