dddd dfdt dfrf dfri dftr didi dif- diff diii din- dini dinn dint dipn dipp dipt dird dirr dirt diti ditt dntp dntt dpdt dpin dpni drif drin drip drit dtdp dttp fdti ffff ffii ffrr fftf fidf fiff fifi fift fiii find fini finn finp fint fipp firn fiti fitt fndd fndn fndr fpdt fpin fprf frid frin frip frit frpd ftdi ftii idfp idid idin idir idrf idtp ifid ifit ifni ifnr ifrf ifri iftn iiii iiit iipf iitr iitt ind- indi infi infp inid init inni innr inp- inpi inpp inpt inri intd inti intn intp intr ipdi ipid ipin ippf ippr ipri irdp iri- irid irin irip irri irtf irti irtp itif itin itrf itri ittf n-ii ndfi ndnp ndnt ndpd ndpr ndrf ndri nfff nfip nidd nidi niff nift niip niir niit nind nini nipr nipt nirt nitf niti nitr nnit nnnn nnpi nnpr nntn npif npin nppd npri nprt nptn nrpn nrrd ntfp ntnd ntpd nttr pdpn pdpr pfff pffr pfft pfit piff piip pind pini pinn pinp pint pipi pipp piri pirn pirr pitf piti pitr pitt pnin pnpp pntd pntr ppid ppif pppd pppn pppp pprf pptn pptt pri- prid prif prii prin prnd prnp prpd prrd prri prti prtp prtr ptpd ptrd ptrf rfdi rfid ridd ridi riff rift riif riin rind rinf rinn ripd ripi ripp ripr ript riri riti ritt rndf rndp rnin rnnt rntd rntp rpdp rpii rppn rptd rptn rrif rrrr rtdt rtnd rttp tdff tdri tfin tfnp tfpt tftp tidd tiff tift tiit tind tini tinn tint tip- tipi tipp tipt tird tiri tirr titi titp titt tndd tndf tpdf tpir tppd tppp tppr tptp tptr trfd trfr tri- trif trin trip trit trpn trpp trtr ttff ttfn tttt