ffff ffii ffrr fftf fiff fifi fifo fift fiii fini finn fino fint fion fior firn fiti fitt fofo foin fono font foof foon foot for- fori forn foro forr fort foti foto fott fr-v frin frio frit fron frot frvt ftii i-no ifit ifni ifno ifnr ifor ifrf ifri iftn ifto iiii iiio iiit iino iioi iioo iitr iitt infi info init inni inno innr ino- inoi inon inor inot inri inro inti intn into intr invt ioii ioio ioit ioni ionn iono ioof iooi iooo iori iotf ioto iri- irin irio iron irov irri irtf irti itif itin itno itof itoi iton itoo itor itrf itri ittf itto ivin ivon ivor n-ii n-tv nfff nfon nfto niff nift niir niit nini nino nion nioo niro nirt nirv nitf niti nito nitr nivo nivr nnit nnnn nnot nntn nnvt nofi noif noin noio noir noit non- noni nonn nono nont noo- noon nooo noor noot noov nor- norf nori norn noro norr nort norv not- noti noto nott notv nov- novi novo nron ntof ntto nttr nttv nvfr nvir nvtv off- offo offr ofit ofno ofor oiii oint oion oirt oiti onir onit onni onno onon onor ont- onti onto ontv ooff oont oooo oort orff orfi ori- orif orin orio orit orni orno oro- orof oron oror orot orri orro orto orvr otif otin otit oto- otof oton otoo otor otov otro otti otto ovi- ovni ovo- ovon ovoo ovot riff rift riif riin rinf rinn rino rion riot riri riti rito ritt rivo rnin rnnt rnot roff rofo roif roin roio roir roit roni rono ront roof rooi roon roor root rori roro rort roti rotn roto rotr rott rovi rovo rrif rrrr rtvi tfin tfot tiff tifo tift tiit tini tinn tino tint tion tiri tiro tirr titi tito titt tivi tivo toff tofi tofo toft toit toni tonn tono toof toon toor toot torf tori torn toro torr tort torv toti toto totr tott tovo trfr tri- trif trin trio trit trno troi tron troo trot trtr ttff ttfn tton tttt tvni tvon tvri tvro tvrr tvtv vfor viff viii vini vino vint vion viri viro virr virt viti vito vitt vivi vivo vnir vnto voff vofr voin voio voir voit voni vonn vont voor voot vor- vori voro vort voto vrin vrio vrnn vron vrot vrto vt-i vvvv