dddd ddss ddts dfds dfdt dfrf dfri dftr dfts didi dids dif- diff difs diii diis diki dird dirk dirr dirs dirt dis- disd disi disk diss dist diti dits ditt dkid drif drit drrs dsdr dsif dsri dsrr dssi dsst dsts dtki dtss f--k fdst fdti ffff ffii ffrr ffss fftf fidf fids fiff fifi fift fiii fiki firk firs fisd fisi fisk fiss fist fiti fits fitt frid frik fris frit frst fsfi fssf ftdi ftii ftrs ftsr idid idir idis idrf idsf idss idts ifid ifis ifit ifrf ifri iiii iiis iiit iirs iisd iisi iisr iist iitr iitt ikid ikki ikri irds iri- irid iris irki irks irri irrs irsf irtf irti irts isds isis isit iskf isri issf issi issr isss istd isti istr ists itif itis itrf itri itrs itsf itsi ittf k-id kddd kddf kddi kddk kddr kdfi kdfr kdft kdis kdkd kdkk kdkr kdkt kdrf kdri kdrs kdsd kdsk kdsr kdss kdst kdtd kdti kdtr kfff kffk kfir kfis kfit kfrd kfri kfrr kfrs kfsd kfsi kfsk kfsr kfst kfti kftk kftt kidd kidi kidk kidr kids kiff kifr kifs kift kiid kiii kiik kiis kiit kikd kikf kiki kikk kikr kikt kirf kiri kirk kirr kirs kirt kisd kisf kisi kisk kisr kiss kist kiti kitr kits kitt kkdd kkdt kkfi kkfr kkfs kkft kkid kkik kkit kkkk kkrf kkrk kkrr kkrs kkrt kksd kksf kksi kksr kkss kkst kktk kkts krdd krdr krds krfd krff krfs krft krid krik kris krit krkd krki krkk krkr krks krrf krri krrk krrr krrs krrt krsd krsf krsk krsr krss krst krti krtk krtr krts ksdi ksdk ksdr ksds ksfi ksfr ksft ksid ksif ksii ksik ksir ksis ksit kskd kskf kskk kskr ksks ksrf ksrr ksrs ksrt kssi kssr ksss ksst ksti kstk kstr ksts kstt ktdd ktdf ktdk ktdr ktfi ktfs ktik ktis ktkk ktkr ktks ktkt ktrf ktri ktrk ktrr ktrs ktrt ktsd ktsf ktsr ktst kttf ktti kttk kttr ktts kttt rfdi rfds rfid ridd ridi rids riff rifs rift riif riis riki rikk riri rirs risd risi risk riss rist riti rits ritt rkkf rkss rkts rrif rrrr rsdd rsds rsid rsis rsts rtdt rtss rtts s-ii sdds sdif sdrs sdsf sdss sfdk sfss sfts sidd sidi sidr sids siff sifr sift siik siit siki sikr siks sirf siri sirk sirr sirs sirt sisd sisi sisk siss sist sit- sitd siti sits sitt skid skif skik skir skis skit skrt sksd skss srfi sris srsd srtr ssdd ssdf ssid ssis ssit ssri ssrs sssf sssi ssss sstd ssts stds stid stif stik stir stis stit stks strd stri strk strs stsf stsi stss sttd sttr tdff tdis tdkr tdri tdss tfrs tfsd tfsi tfss tidd tids tiff tift tiit tiki tird tiri tirr tirs tisi tiss tist titi tits titt tkts trfd trfr tri- trif trik tris trit trsd trsi trst trtr tsid tsis tsks tssf tssi tssr tsst tsts ttff ttss tttt