nsin nsis nsna nssa nssb nssc nsss nstc nsts ntbc ntcc ntia ntis ntsb ntsc ntss s-ib s-ic s-ii sa-c saab saac saag saan saas saat saba sabb sabc sabi sabs saca sacc saci sacn sacs sact saga sagg sagi sags sagt saia saic sain sais sait sana sang sani sann sans sant sasa sasc sasi sass sast sata satb satc satg sati satn sats satt sbaa sbac sbai sbas sbbs sbca sbcc sbcs sbct sbia sbic sbig sbsa sbsi sbst sbtc sbtn scaa scab scac scag scai scan scas scat scba scbi sccc sccs scct scgs sci- scia scic scin scis scit scna scnt scsa scsc scsi scsn scst sctc sctn scts sgaa sgac sgca sgcb sgcg sggg sggs sgic sgss sgta sgts siaa siab siac siag siai sian sias siat siba sibc sibi sibs sica sicc sici sics siga sigg sigi sign sigs siit sina sing sini sinn sins sint sisa sisc sisi siss sist sit- sita sitc siti sitn sits sitt snab snag snas snat snba snca sncc snia snib snig snit snns ssaa ssab ssac ssan ssas ssat ssbn ssca sscc ssci sscs ssgs ssgt ssin ssis ssit ssns sssa sssb sssc sssi ssss ssta sstb sstc ssts stab stac stag stai stan stas stat stbc stbs stca stcc stcs stia stib stic stig stis stit stng stnn stns stsi stss sttc taa- taag taan taas taat taba tabb tabc tabi tabs taca tacc taci tacs tact taga tagg tagi tags taia taig tain tais tait tana tang tani tann tans tant tasa tasb tasc tasi tass tast tata tatb tati tats tatt tbas tbbs tbca tbcb tbcc tbgs tbit tbst tbta tcbs tcca tccc tcga tcnn tctc tcts tgcc tgtc tgts tiaa tiab tian tias tiba tibi tibs tica ticc tics tiga tigi tigs tiit tina tinc ting tini tinn tins tint tisa tisb tisi tiss tist tita titc titi tits titt tnag tnbc tnca tncc tngs tnts tsaa tsai tsat tsbc tsca tscc tscg tsgt tsia tsig tsin tsis tsna tssa tssg tssi tsst tstc tsts ttab ttbb ttcn ttss tttt