dddd ddps ddss ddts dfds dfdt dfrf dfri dftr dfts didi dids dif- diff difs diii diis din- dini dinn dins dint dipn dipp dips dipt dird dirr dirs dirt dis- disd disi disp diss dist diti dits ditt dnis dntp dntt dpdt dpin dpni dpsd dpst dpts drif drin drip drit drrs drsp dsdp dsdr dsif dsip dspf dsps dspt dsri dsrp dsrr dssi dssn dssp dsst dstn dsts dtdp dtss dttp fdst fdti ffff ffii ffps ffrr ffss fftf fidf fids fiff fifi fift fiii find fini finn finp fins fint fipp fips firn firs fisd fisi fiss fist fiti fits fitt fndd fndn fndr fnrs fnsp fpdt fpin fprf frid frin frip fris frit frns frpd frps frst fsfi fspf fssf fssp ftdi ftii ftps ftrs ftsr idfp idid idin idir idis idps idrf idsf idss idtp idts ifid ifis ifit ifni ifnr ifns ifps ifrf ifri ifsp iftn iiii iiis iiit iipf iirs iisd iisi iisp iisr iist iitr iitt ind- indi inds infi infp infs inid inis init inni innr inns inp- inpi inpp inpt inri inrs insp inss inst intd inti intn intp intr ints ipdi ipid ipin ippf ippr ipri ipsi ipsp ipss ipts irdp irds iri- irid irin irip iris irps irri irrs irsf irsp irtf irti irtp irts isdn isds isfp isin isis isit isnt ispf ispr isps isri isrp issf issi issp issr isss istd isti istp istr ists itif itin itis itrf itri itrs itsf itsi itsp ittf n-ii ndfi ndnp ndnt ndpd ndpr ndps ndrf ndri ndsf ndsi ndss nfff nfip nfps nfrs nfsr nidd nidi nids niff nift niip niir niit nind nini nins nipr nips nipt nirs nirt nisd nisi nisp niss nist nitf niti nitr nits nnit nnnn nnpi nnpr nnss nntn npif npin nppd npri nprt npss nptn nrds nrpn nrps nrrd nrsp nrts nsdf nsds nsdt nsfs nsin nsis nsnr nspi nsps nsrd nssf nssp nssr nsss nstd nstp nsts ntds ntfp ntfs ntis ntnd ntpd ntsf ntss nttr pdfs pdns pdpn pdpr pdrs pdsd pdss pfff pffr pfft pfis pfit pfps pids piff pifs piip pind pini pinn pinp pins pint pipi pipp pips piri pirn pirr pirs pisd pisi piss pist pitf piti pitr pits pitt pnin pnpp pntd pntr ppds ppid ppif pppd pppn pppp ppps pprf ppsf ppss pptn ppts pptt prfs pri- prid prif prii prin pris prnd prnp prpd prps prrd prri prrs prsd prsi prss prti prtp prtr psdi psdp psdr psds psfs psid psip psis psni psnr pspi pspp pspr psps psrd psrp psst psts ptpd ptrd ptrf ptsd rfdi rfds rfid ridd ridi rids riff rifs rift riif riin riis rind rinf rinn ripd ripi ripp ripr rips ript riri rirs risd risi risp riss rist riti rits ritt rndf rndp rnds rnin rnnt rnsp rntd rntp rpdp rpii rppn rpps rptd rptn rpts rrif rrrr rrsp rsdd rsds rsid rsis rsnn rsnr rsps rstp rsts rtdt rtnd rtns rtps rtss rttp rtts s-ii sdds sdif sdpr sdps sdrs sdsf sdss sfnt sfpd sfss sftp sfts sidd sidi sidr sids siff sifr sift siit sind sini sinn sinp sins sint sipi sipp sips sipt sirf siri sirp sirr sirs sirt sisd sisi siss sist sit- sitd siti sitn sits sitt snid snip snir snit snns snpp snrs snsd sntr spdf spdp spdr spdt spfs spin spip spir spis spit spns sppd sppf spps sprd spri sprs spsd spsp spss spst sptr spts srfi sris srni srnn srps srpt srsd srsp srtp srtr ssdd ssdf ssdp ssfp ssid ssin ssis ssit ssns sspf ssps sspt ssri ssrs sssf sssi ssss sstd sstp ssts stds stfn stid stif stip stir stis stit stnd stnn stnr stns stpd stpf stpp stps strd stri strn strs stsf stsi stss sttd sttr tdff tdis tdri tdss tfin tfnp tfpt tfrs tfsd tfsi tfss tftp tidd tids tiff tift tiit tind tini tinn tins tint tip- tipi tipp tips tipt tird tiri tirr tirs tisi tiss tist titi titp tits titt tndd tndf tnsp tnts tpdf tpir tppd tppp tppr tprs tptp tptr trfd trfr tri- trif trin trip tris trit trpn trpp trps trsd trsi trst trtr tsid tsin tsis tspn tsps tspt tssf tssi tssr tsst tsts ttff ttfn ttss tttt