-ous bbbb bbbs bbfn bffs bnss bobb bobo bobs bobu boff bofs bofu bonn bono bons bonu boob boof boon boos bosn boso boss bosu bouf boun bous bsff bsfs bsns bson bsos bubb bubo bubs bubu buff bufo bunb bunn buno buns bunu buon buss busu buus fbus ffff ffss ffun fnuf fobs fofo fono fons foof foon foos fosb foso foss foun fous fsfo fssf fubb fubs fubu fuff fufu funf funs fuso fuss fusu nbbo nbuf nfff nfon nfsu nnnn nnos nnss nobo nobs nobu non- nonn nono nons nonu noo- noob noon nooo noos nos- noss nosu noun nous nsbo nsfs nsof nsos nsou nssb nssf nsso nsss nsub nubs nuff nunn nuno nuns nuon nuss nusu obbo obon obos obsn obss obus off- offo offs offu ofno ofus onno onon onos onso onus ooff oofs oons oooo ooos oous osno osoo osos ossb osso ossu osun oubs ouff oun- ouu- s-os sbbs sbus sfnb sfos sfss sfsu snfu snns snob snoo snos snub snus sobo sobs sobu sofo son- sono sons sonu soof soon soos soso soss souf soun sous ssbn ssns sssb sssf ssss sub- subb subo subs suf- suff sufs sufu sun- sunb sunn suno suns sunu suos sus- suso suss susu suus ubbo ubon ubos ufos unno unns unon unos uns- unso unus uofo usbs usfs usno usnu usos ussb ussf usss ussu usun usus uuno uuuu