a-ii a-wa aaaa aaai aaap aaas aaii aais aapa aapi aaps aasa aasi aass aaww aiai aias aiia aipa aipi aips aisa aisi aiwa apai apap apas apaw api- apia apip apis appa apps apsa apsi apss apwa asaa asai asap asas asia asii asip asis aspa aspi asps assa assi assp asss awas awpp awss awwa awws iaaa iaai iaap iaas iaia iais iapa iapp iaps iasa iasi iasp iawa iias iiii iiis iipa iisi iisp iiwi ipas ippa ipsa ipsi ipsp ipss ipsw is-a isai isas isaw isia isis ispa isps ispw issa issi issp isss iwai iwas iwis iwiw iwps paap paas paia paip pais papa papi papp paps pasa pasi pasp pass pasw pawa pawi paws piai pias piia piip pipa pipi pipp pips pisa pisi piss piwi ppap pppa pppp ppps ppss psap psas psaw psia psip psis pspi pspp psps pssa pswa pwaa s-ii saap saas saia saip sais sapa sapi sapp saps sasa sasi sass sawa sawi saws siaa siai sias sipa sipi sipp sips sisa sisi siss siwa siwi sp-a spap spas spaw spia spip spis spps spsa spsp spss ssaa ssap ssas ssaw ssis sspa ssps sssa sssi ssss ssws swai swap swas swip swis swpa swss waaa waai waas waaw waia waip wais wapa wapi wapp waps wapw wasa wasi wasp wass wawa wawi waws wiaa wiii wiis wipa wipi wipp wips wisa wisp wiss wisw wiwa wiwi wpaa wpap wpaw wpia wpip wppa wppi wpsa wpsp wpwa wsaa wsai wsia wsip wsis wspa wsps wssi wssp wsss wssw wswi wsws wsww wwii wwip wwis wwpa wwpw wwsi wwsp wwss wwwa wwwi wwws wwww