aaaa aaar aaas aara aars aart aasa aass aast aata aatt arar aras arat arr- arra arrr arrs arrt ars- arsa arst arta artr asaa asar asas asat asra asrs assa assr asss asst asta astr asts at-t ataa atar atas atat atra atst atta attr atts raas raat rara rars rasa rass rast rata rats ratt rras rrat rrrr rsaa rssa rsts rtas rtss rtts saar saas saat sara sarr sars sart sasa sass sast sata satr sats satt sras srta srtr ssaa ssas ssat ssra ssrs sssa ssss ssta ssts star stas stat stra strs stss sttr taa- taar taas taat tara tarr tars tart tasa tasr tass tast tata tatr tats tatt traa tras trat trra trst trtr tsaa tsar tsat tssa tssr tsst tsts ttss tttt