bbbb bblb bbwr blno blob blon bloo blow blw- bnor bnrr bobb bobo bobw boll boln bolo bonn bono boob bool boon boor boow bor- born boro borr borw bowl bown bowr brno brob brol bron broo bror brow brrr lblr llll llnw lloo lob- lobb lobo loll lolo lono lonr loob lool loon loor lorn loro lowb lowl lown lowr loww lron lrrr lwoo lwow nbbo nlow nlrb nnnn nobo noll nolo non- nonn nono nonw noo- noob nool noon nooo noor nor- norb norn noro norr norw nowl nown nrlb nron nrrl nwbl nwbn nwbw obbo obol obon obor obro olbo ollo olon olor onno onon onor oolo oooo orbb orbo orlo orno oro- oron oror orro orwo owow rbbb rbbr rnbr rob- robb robo roll rolo rono ronw roob rool roon roor roro rowb rowl rown rowr roww rrrr wbbb wbbl wbbn wbbo wbbr wbbw wblb wbll wbln wblo wblw wbnb wbnl wbnr wbnw wbob wbol wbon wbor wbow wbrb wbrn wbrr wbrw wbwb wbwl wbwn wbwo wlbb wlbl wlbn wlbr wlbw wlll wlln wllr wllw wlnl wlno wlob wlol wlon wloo wlor wlrb wlrn wlro wlrr wlrw wlwl wnbb wnbl wnbn wnbr wnbw wnlo wnlr wnnl wnnr wnnw wnob wnoo wnor wnow wnrn wnrr wnrw wnwn wnwr wnww wobb wobl wobn wobo wolb woll wolr wolw wonb wonn wonw woob wool woon woow worb worl worn woro worr worw wowb wowl wown wowo woww wrbb wrbl wrbn wrbo wrbw wrlb wrll wrlr wrnb wrnl wrnn wrno wrnr wrnw wrob wrol wron wroo wrow wrrb wrrl wrrn wrro wrrw wrwb wrwn wrwr wwbb wwbl wwbn wwbr wwlb wwll wwln wwlr wwlw wwnb wwnl wwnn wwno wwnr wwnw wwol wwon wwor wwow wwrb wwrl wwrr wwrw wwwl wwwn wwwr wwww