iiii iiis iisi iisp ilis ill- illi illp ills ipil ipsi ipsp ipss isil isis isls isps issi issp isss liii liis lili lill lils lip- lipi lipl lipp lips lisi lisp liss llll llps lppl lpss lspl lssp piip pil- pili pill pils pipi pipp pips pisi piss plip plis plpp plsi plss ppli pppp ppps ppss psil psip psis pspi pspp psps s-ii sil- sili sill sils sipi sipp sips sisi siss sl-i slip sllp slpi slpp slps spip spis splp spls spps spsp spss ssis sslp sspl ssps sssi ssss