bbbb bbbs bnpp bnss bobb bobo bobs bonn bono bons boob boon boop boos bopp bops bosn boso boss bsns bson bsos bspp nbbo nbpp nbps nbsp nnnn nnos nnss nobo nobs non- nonn nono nons noo- noob noon nooo noop noos nops nos- noss npss nsbo nsos nsps nssb nsso nssp nsss obbo obon obos obsn obss onno onon onos onso oons oooo ooos oops opo- opon opos oppo opps osbp osno osoo osos ossb osso pbsp pnon pnpo pnpp pobo pobs pono ponp pons poon poop poos pop- popo popp pops posb posn poso poss ppos pppn pppo pppp ppps ppss pson psos pspp psps psso s-os sbbs sbsp snns snob snoo snop snos snpo snpp sobo sobp sobs son- sono sons soon soop soos sopo sopp sops soso soss spns spon spoo spop spos spps spso spsp spss ssbn ssns ssop sspo ssps sssb ssss