ffff ffii ffrr fftf fiff fifi fifo fift fiii fiji fior fiti fitt fofo foof foot for- fori forj foro forr fort foti foto fott frio frit frot ftii ifit ifor ifrf ifri ifto iiii iiio iiit iioi iioo iitr iitt ijji ioii ioio ioit ioof iooi iooo iori iotf ioto iri- irio irri irtf irti itif itof itoi itoo itor itrf itri ittf itto j-ro jftr jiff jiji jiri jiro jirt jiti jito jofr joio joit joji jojo joof joor joot jorf joro jort joto jott off- offo offr ofit ofor oiii oirt oiti ooff ooij ooji oooo oort orff orfi ori- orif orio orit orji oro- orof oror orot orri orro orto otif otit oto- otof otoo otor otro otti otto riff rift riif rijf riji rijo riot riri riti rito ritt roff rofo roif roio roir roit roji rojo roof rooi roor root rori roro rort roti rotj roto rotr rott rrif rrrr tfot tiff tifo tift tiit tiji tijo tiri tiro tirr titi tito titt toff tofi tofo toft toit toji tojo toof toor toot torf tori toro torr tort toti toto totr tott trfr tri- trif trio trit troi troo trot trtr ttff tttt