-ous bbbb bbbs bbfn bbox bffs bnss bobb bobo bobs bobu boff bofs bofu bonn bono bons bonu boob boof boon boos boox 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 busx buus fbus ffff ffss ffun fnuf fobs fofo fono fons foof foon foos fosb foso foss foun fous foxx fsfo fssf fubb fubs fubu fuff fufu funf funs funx fuso fuss fusu nbbo nbuf nfff nfon nfsu nnnn nnos nnss nobo nobs nobu nofx non- nonn nono nons nonu nonx noo- noob noon nooo noos nos- noss nosu noun nous nsbo nsfs nsof nsos nsou nssb nssf nsso nsss nsub nubs nuff nufx nunn nuno nuns nuon nuss nusu obbo obon obos obox 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- oxo- oxof oxon oxos oxox oxuf oxus oxxo 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 soxs 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 sux- ubbo ubon ubos ufos ufxs unno unns unon unos unox uns- unso unus uofo usbs usfs usno usnu usos ussb ussf usss ussu usun usus uuno uuuu uxus xbox xoxo xson xsun xuxu xxxo xxxx