f--k ffff ffrr fftf fofo fono font foof fook foon foot for- fork forn foro forr fort foto fott foxx fron frot kfff kffk kffn kffx kfkx kfnf kfnk kfnn kfno kfnx kfok kfon kfoo kfor kfox kfrn kfro kfrr kfrx kftk kftt kftx kfxf kfxn kfxr kfxt kfxx kkfn kkfr kkft kkkk kknn kkno kknt kknx kkon kkoo kkor kkot kkrf kkrk kkrn kkro kkrr kkrt kkrx kktk kktx kkxk kkxt kkxx knfo knfr knft knfx knkk knkt knnk knnr knok knon knor knot knox knrk knro knrx kntk kntn knto kntr kntx knxr knxt knxx koff kofk kofo koft kofx kokf kokk kokn koko kokr kokx konk kono kont kook koon kooo koor koot korf kork korn koro korr kort kotk kotn koto kotr kott koxr krff krfn krfo krft krfx krkk krkn krko krkr krkx krnk krnn krno krnt krof krok kroo kror krox krrf krrk krrn krro krrr krrt krrx krtk krtn krto krtr krtx krxf krxk krxo krxr krxt krxx ktfn ktfo ktkk ktkn ktko ktkr ktkt ktkx ktnf ktnk ktnn ktno ktnt ktnx ktok kton ktoo ktor ktot ktox ktrf ktrk ktrn ktro ktrr ktrt ktrx kttf kttk kttn ktto kttr kttt kttx ktxk ktxo ktxr ktxt kxff kxfn kxft kxkk kxkt kxkx kxno kxnt kxok kxon kxoo kxor kxox kxrk kxro kxrr kxrx kxtf kxtk kxtn kxto kxtt kxtx kxxf kxxk kxxn kxxo kxxr kxxt kxxx nfff nfon nfto nknt nkok nkor nkrf nktr nnnn nnot nntn nofx noko non- nonn nono nont nonx noo- nook noon nooo noor noot nor- norf nork norn noro norr nort not- noto nott nron ntof ntto nttr off- offo offr ofno ofor okko okno okok okon okor okot okro okto onno onon onor ont- onto ooff oont oooo oort orff orko orno oro- orof orok oron oror orot orro orto oto- otof otok oton otoo otor otro otto oxo- oxof oxon oxox oxxo rkkf rnnt rnot roff rofo rokk roko rokr ronk rono ront roof rook roon roor root roox rork roro rort rotk rotn roto rotr rott roxo rrrr rtkn tfot tfox tkof tkon toff tofo toft toko tonk tonn tono toof took toon toor toot torf tork torn toro torr tort torx toto totr tott tox- toxo toxt trfr trno tron troo trot trox trtr ttff ttfn tton tttt txtr xorn xoro xoxo xtro xxxo xxxx