ffff ffii ffrr fftf fiff fifi fifo fift fiii fini finn fino finp fint fion fior fipp firn fiti fitt fofo foin fono font foof foon foot fopp for- fori forn foro forr fort foti foto fotp fott fpin fprf frin frio frip frit fron frop frot ftii ftop i-no ifit ifni ifno ifnr ifor ifpo ifrf ifri iftn ifto iiii iiio iiit iino iioi iioo iiop iipf iitr iitt infi info infp init inni inno innr ino- inoi inon inor inot inp- inpi inpp inpt inri inro inti intn into intp intr ioii ioio ioit ioni ionn iono ioof iooi iooo iori iotf ioto ipin ipop ippf ippo ippr ipri ipto iri- irin irio irip iron irop irri irtf irti irtp itif itin itno itof itoi iton itoo itor itrf itri ittf itto n-ii nfff nfip nfon nfto niff nift niip niir niit nini nino nion nioo nipr nipt niro nirt nitf niti nito nitr nnit nnnn nnot nnpi nnpr nntn nofi noif noin noio noir noit non- noni nonn nono nont noo- noon nooo noop noor noot nor- norf nori norn noro norr nort not- noti noto nott npif npin npri nprt nptn nron nrpn ntfp ntof ntop ntto nttr off- offo offr ofit ofno ofor oftp oiii oint oion oirt oiti onir onit onni onno onon onor onpt ont- onti onto ooff oont oooo oort ootp opii opin opio opit opo- opon opor oppi oppo opti optn opto orff orfi ori- orif orin orio orit orni orno oro- orof oron oror orot orpi orri orro orto otfp otif otin otit oto- otof oton otoo otor otpp otro otti otto pfff pffr pfft pfit piff piip pini pinn pino pinp pint pion piot pipi pipo pipp piri pirn piro pirr pitf piti pito pitr pitt pnin pnon pnot pnpo pnpp pnro pntr poff pofi poin poio poni pono ponp pont poof poon poop poor poot pop- popi popo popp popt pori porn poro porr port potf poti poto pott ppif pppn pppo pppp pprf pptn pptt pri- prif prii prin prnp pro- prof pron proo prop prot prri prti prtp prtr ptop ptrf riff rift riif riin rinf rinn rino rion riot ripi ripp ripr ript riri riti rito ritt rnin rnnt rnot rntp roff rofo roif roin roio roir roit roni rono ront roof rooi roon roop roor root ropo rori roro rort roti rotn roto rotr rott rpii rpof rpon rppn rptn rrif rrrr rttp tfin tfnp tfot tfpt tftp tiff tifo tift tiit tini tinn tino tint tion tiop tip- tipi tipo tipp tipt tiri tiro tirr titi tito titp titt toff tofi tofo toft toit toni tonn tono toof toon toor toot top- topf topi topo topp topt torf tori torn toro torp torr tort toti toto totr tott tpir tpon tppp tppr tptp tptr trfr tri- trif trin trio trip trit trno troi tron troo trop trot trpn trpp trtr ttff ttfn tton ttop tttt