d-ix dddd ddot ddss ddts didi dido dids diii diis dios diot dis- disd disi diso diss dist diti dito dits ditt dixi do-x dod- dodd dodi dodo dods doid dois doit doix dood doos doot dosi doso doss dost dotd doti doto dots dott dsos dssi dsst dsto dsts dtot dtox dtss dttx dtxt dxds dxii dxix dxss dxts dxxx iddo idid idio idis idos idso idss idts iiii iiio iiis iiit iioi iioo iios iisd iisi iist iitt iod- iodd iodo ioii ioio ioit iooi iooo ioos ioso ioto isds isis isit iso- isos issi isso isss istd isti isto ists itdo itis itoi itoo itos itsi itso itto ixos ixxi oddd oddi odds odio odis odoo odos odot odso odts oido oids oiii oios oisd oist oiti oodi ooid oooo ooos oosi oost oots osdi osii osis osoi osoo osos ossd ossi osso osti osts otis otit oto- otoo otos otso otti otto otts oxi- oxid oxis oxo- oxos oxox oxsi oxxo s-ii s-os sdds sdio sdot sdss sidd sidi sido sids siit siod sios siot siox sisd sisi siss sist sit- sitd siti sito sits sitt sixo sixt sixx sodd sodo sods sois soit sood soos soot sosi soso soss sost soto sots soxs ssdd ssid ssis ssit ssot sssi ssss sstd ssts stds stid stio stis stit stix stod stoo stos stot stox stsi stss sttd tdis tdss tidd tids tiit tios tisi tiso tiss tist titi tito tits titt tixt todd todi todo tods todt toid tois toit tood toos toot tosi toso toss tost tosx totd toti toto tots tott tox- toxi toxo toxs toxt tsid tsis tsix tsoi tsos tssi tsst tsts ttss tttt txii xdos xidi xiii xisi xist xito xixi xois xoxo xxii xxix xxxi xxxo xxxx