dddd ddss dfds dfrf dfri didi dido dids dif- diff difs diii diis dior dios dird dirr dirs dis- disd disi diso diss dod- dodd dodi dodo dods doff doid dois dood doof door doos dord dorf dori doro dorr dors dosi doso doss drif drod drof drrs dsdr dsif dsos dsri dsrr dssi fdos ffff ffii ffrr ffss fidf fido fids fiff fifi fifo fiii fior fios firs fisd fisi fiss fofo foid fois food foof foos for- ford fori foro forr fors fosi foso foss frid frio fris fros frso fsfi fsfo fssf iddo idid idio idir idis idos idrf idro idsf idso idss ifid ifis ifor ifrf ifri ifso iiii iiio iiis iioi iioo iios iirs iisd iisi iisr iod- iodd iodo ioii ioio ioof iooi iooo ioos iori iors ioso irdo irds iri- irid irio iris irod irri irrs irsf isds isis iso- isof isor isos isri issf issi isso issr isss oddd oddi odds odio odir odis odoo odor odos odso ofdr off- offo offr offs ofid ofor oido oids oiii oios oisd oodi ooff oofs ooid oooo ooos oord oosi ordo ords orff orfi orfs ori- orid orif orio oris oro- orof oror oros orri orro orrs orsi orso osdi osii osis osoi osoo osor osos osrd osro ossd ossi osso rdio rdos rdso rfdi rfds rfid ridd ridi rido rids riff rifs riif riis rios riri rirs risd risi riso riss rodd rodi rodo rods roff rofo roid roif roio roir rois rood roof rooi roor roos rori roro rosi roso ross rrif rrrr rsdd rsds rsid rsis rsos s-ii s-os sdds sdif sdio sdrs sdsf sdss sfio sfor sfos sfro sfss sidd sidi sido sidr sids siff sifo sifr siod sior sios sirf siri siro sirr sirs sisd sisi siss sodd sodo sods sofi sofo soif soir sois sood soof soor soos sord sori soro sorr sors sosi soso soss srfi sris sros srsd ssdd ssdf ssid ssis ssri ssrs sssf sssi ssss