dddd ddot ddss ddts didi dido dids diii diis dior dios diot dird dirr dirs dirt dis- disd disi diso diss dist diti dito dits ditt dod- dodd dodi dodo dods doid dois doit dood door doos doot dord dori doro dorr dors dort dosi doso doss dost dotd doti doto dots dott drit drod drot drrs dsdr dsos dsri dsrr dssi dsst dsto dsts dtor dtot dtss iddo idid idio idir idis idos idro idso idss idts iiii iiio iiis iiit iioi iioo iios iirs iisd iisi iisr iist iitr iitt iod- iodd iodo ioii ioio ioit iooi iooo ioos iori iors ioso ioto irdo irds iri- irid irio iris irod irri irrs irti irts isds isis isit iso- isor isos isri issi isso issr isss istd isti isto istr ists itdo itis itoi itoo itor itos itri itrs itsi itso itto oddd oddi odds odio odir odis odoo odor odos odot odso odts oido oids oiii oios oirt oisd oist oiti oodi ooid oooo ooos oord oort oosi oost oots ordo ords ori- orid orio oris orit oro- oror oros orot orri orro orrs orsi orso orto orts osdi osii osis osoi osoo osor osos osrd osro ossd ossi osso osti ostr osts otis otit oto- otoo otor otos otro otrs otso otti otto otts rdio rdos rdso ridd ridi rido rids riis rios riot riri rirs risd risi riso riss rist riti rito rits ritt rodd rodi rodo rods roid roio roir rois roit rood rooi roor roos root rori roro rort rosi roso ross rost roti roto rotr rots rott rrrr rsdd rsds rsid rsis rsos rsts rtdt rtss rtts s-ii s-os sdds sdio sdot sdrs sdss sidd sidi sido sidr sids siit siod sior sios siot siri siro sirr sirs sirt sisd sisi siss sist sit- sitd siti sito sits sitt sodd sodo sods soir sois soit sood soor soos soot sord sori soro sorr sors sort sosi soso soss sost soto sots sris sros srsd srtr ssdd ssid ssis ssit ssot ssri ssrs sssi ssss sstd ssts stds stid stio stir stis stit stod stoo stor stos stot strd stri stro strs stsi stss sttd sttr tdis tdor tdri tdss tidd tids tiit tios tird tiri tiro tirr tirs tisi tiso tiss tist titi tito tits titt todd todi todo tods todt toid tois toit tood toor toos toot tord tori toro torr tors tort tosi toso toss tost totd toti toto totr tots tott tri- trio tris trit trod troi troo tros trot trsd trsi trst trtr tsid tsis tsoi tsos tssi tssr tsst tsts ttss tttt