dddd ddss dfds didi dido dids dif- diff difs diii diis dios dis- disd disi diso diss dod- dodd dodi dodo dods doff doid dois dood doof doos dosi doso doss dsif dsos dssi fdos ffff ffii ffss fidf fido fids fiff fifi fifo fiii fios fisd fisi fiss fofo foid fois food foof foos fosi foso foss fsfi fsfo fssf iddo idid idio idis idos idsf idso idss ifid ifis ifso iiii iiio iiis iioi iioo iios iisd iisi iod- iodd iodo ioii ioio ioof iooi iooo ioos ioso isds isis iso- isof isos issf issi isso isss oddd oddi odds odio odis odoo odos odso off- offo offs ofid oido oids oiii oios oisd oodi ooff oofs ooid oooo ooos oosi osdi osii osis osoi osoo osos ossd ossi osso s-ii s-os sdds sdif sdio sdsf sdss sfio sfos sfss sidd sidi sido sids siff sifo siod sios sisd sisi siss sodd sodo sods sofi sofo soif sois sood soof soos sosi soso soss ssdd ssdf ssid ssis sssf sssi ssss