sern serp serr sers sesa sese sesi sess siaa siab siae siai sial sian sias siba sibe sibi sibs siel sien sier sies sil- sila sile sili sill sils sina sine sini sinn sinp sins sipa sipe sipi sipp sips sira sire siri sirp sirr sirs sisa sise sisi siss sl-i slaa slab slae slai slan slap slas slbp slea sleb slee slep sler sles slib slie slip slir slln sllp slpi slpp slps slre slrn slrp slrs slsa snab snap snar snas snba sneb snee snel snep sner snes snia snib snie snip snir snla snns snpp snra snrs sp-a spae spal span spap spar spas spea speb spee spel spen sper spes spia spib spie spin spip spir spis spla sple splp splr spls spne spns spps spri sprs spsa spse spsp spss sras sreb sres srib sris srna srni srnn srps srsp ssaa ssab ssan ssap ssas ssbn ssbr ssee ssep sses ssin ssis ssla ssle sslp ssns sspa sspe sspl ssps ssra ssri ssrl ssrs sssa sssb sssi ssss