dddd ddss ddts didi dids diii diis dird dirr dirs dirt dis- disd disi diss dist diti dits ditt drit drrs dsdr dsri dsrr dssi dsst dsts dtss idid idir idis idss idts iiii iiis iiit iirs iisd iisi iisr iist iitr iitt irds iri- irid iris irri irrs irti irts isds isis isit isri issi issr isss istd isti istr ists itis itri itrs itsi ridd ridi rids riis riri rirs risd risi riss rist riti rits ritt rrrr rsdd rsds rsid rsis rsts rtdt rtss rtts s-ii sdds sdrs sdss sidd sidi sidr sids siit siri sirr sirs sirt sisd sisi siss sist sit- sitd siti sits sitt sris srsd srtr ssdd ssid ssis ssit ssri ssrs sssi ssss sstd ssts stds stid stir stis stit strd stri strs stsi stss sttd sttr tdis tdri tdss tidd tids tiit tird tiri tirr tirs tisi tiss tist titi tits titt tri- tris trit trsd trsi trst trtr tsid tsis tssi tssr tsst tsts ttss tttt