bbbbbb blotno blotto blount blubbo blublu bolbol bolobo bololo bolton boltun bonbon bonfol bonnot bonnut bonobo bonton booboo booton botbol bottlo botton botulu boubou boulon boulot boulou bounou boutob bouton bububu buffol buffon bufolo bufton bulbo- bulbul bullon bullou bulolo bunol bunton buttlo button buttto buutuo flobot foboff folbot foofoo foufou fullof fullon fulton fultot funoon funton futbol futton lobolo lofton lolobo lonnol looloo loulon loulou loutou lubbon lufful lunlun lutton n-toon nobbut nobull nofool non-no nonono nonoon noonoo noonto notlob notout notton nottoo notulu nounou ntuntu null-o nunton obolno obolon offton offutt ollunt on-off onfoot onloft ontful oooooo oulton ouolon outlot outoul tbontb to-on toboot tolbot tollon tolono tolton toluol tonbon tonlon tonono tonton tootoo tou-fu toubon toubul toulon touton toutou toutuo tubful tubul- tuffon tufton tunful tuntul tuotuo tutton tuttul tuttut u-bolt u-boot ubuntu unbolt unboot unfool unfoot unfoul unfull unlull uolbut uutool