irid iris irra irrc irri irrs irsa irta irti irts is-a isac isad isai isar isas isat isba isbd isbt isca iscc iscd isci iscr iscs isct isda isdb isdc isds isia isic isis isit isra isri issa issc issi issr isss ista istc istd isti istr ists itaa itac itai itar itas itat itbs itcs itia itic itis itra itri itrs itsa itsi itta raab raad raas raat raba rabb rabi rabs rac- raca racc raci racs ract rada radc radd radr rads radt raia raic raid raii rair rais rait rara rarb rari rars rasa rasc rasd rasi rass rast rata rati rats ratt rbbb rbbr rbbs rbds rbis rbsd rbss rbst rcac rcas rcbc rccb rccc rccs rcdc rcds rcic rcid rcis rcrd rcsa rcsc rcsd rcsi rcss rctc rcti rcts rdac rdas riaa riab riad riai rias riat rib- riba ribs rica ricc rics rict rida ridc ridd ridi rids riia riis riri rirs risa risc risd risi riss rist rita riti rits ritt rrad rras rrat rrrr rsaa rsai rsbi rscc rscs rsdd rsds rsid rsis rssa rsts rtai rtas rtca rtcc rtdt rtss rtts s-ib s-ic s-ii sa-c saab saac saad saar saas saat saba sabb sabc sabi sabr sabs saca sacc sacd saci sacr sacs sact sada sadb sadc sadd sadi sadr sads sadt saia saic said sair sais sait sara sarc sard sari sarr sars sart sasa sasc sasd sasi sass sast sata satb satc satd sati satr sats satt sbaa sbac sbai sbar sbas sbbs sbca sbcc sbcs sbct sbds sbia sbic sbsa sbsd sbsi sbst sbtc scaa scab scac scad scai scar scas scat scba scbi sccc sccs scct scda scdc scds sci- scia scic scid scir scis scit scr- scra scrc scri scrs scsa scsc scsd scsi scsr scst sctc sctd sctr scts sdba sdcc sddc sdds sdib sdic sdrc sdrs sdsc sdss siaa siab siac siai sias siat siba sibc sibi sibs sica sicc sici sics sida sidd sidi sidr sids siit sira sirc siri sirr sirs sirt sisa sisc sisd sisi siss sist sit- sita sitc sitd siti sits sitt sras srbc srcc srct srib sris srsd srta srtr ssaa ssab ssac ssas ssat ssbr ssca sscc ssci sscs ssdc ssdd ssid ssis ssit ssra ssrc ssri ssrs sssa sssb sssc sssi ssss ssta sstb sstc sstd ssts stab stac stad stai star stas stat stbc stbd stbs stca stcc stcs stds stia stib stic stid stir stis stit stra strc strd stri strs stsi stss sttc sttd sttr taa- taar taas taat taba tabb tabc tabi tabs taca tacc taci tacs tact tada tads taia tair tais tait tara tarb tarc tard tari tarr tars tart tasa tasb tasc tasi tasr tass tast tata tatb tati tatr tats tatt tbar tbas tbbs tbca tbcb tbcc tbcd tbit tbrb tbst tbta tcad tcbs tcca tccc tcdd tctc tcts tdac tddb tdis tdra tdri tdss tiaa tiab tiar tias tiba tibi tibs tica ticc tics tidc tidd tids tiit tira tirb tird tiri tirr tirs tisa tisb tisi tiss tist tita titc titi tits titt traa trab trac trad trai tras trat trca trcc tri- tria trib tric tris trit trra trsd trsi trst trtc trtr tsaa tsai tsar tsat tsbc tsbd tsca tscc tsdb tsia tsid tsis tssa tssi tssr tsst tstc tsts ttab ttbb ttss tttt