rtns rtss rtts sccc scce sccl sccs scct scdc scdf scds scec scee scel scer scet scfc scfe scl- sclc scls scnd scnr scnt scr- scrc scre scrn scrs scsc scsd scsl scsn scsr scst sctc sctd sctl sctn sctr scts sdcc sddc sdds sdef sder sdes sdet sdfc sdlc sdls sdlt sdrc sdrs sdsc sdsf sdsl sdss se-c se-d se-e se-f se-n se-s se-t sec- secc secd sece secn secr secs sect sede seds seec seed seef seel seen seer sees seet seff sefl seft seld sele self sell sels selt send sene senn senr sens sent serc serd sere serf sern serr sers sert sesc sese sess sest set- setc sete setf setl sets sett sfcc sfcs sfdc sfer sffc sflc sfls sfne sfnt sfrc sfss sfts slcc slcd slds sled slee sler sles slet slft slln slrc slre slrn slrs slsc slst slts sncc sncf sned snee snel sner snes snet snlf snns snrs snsd snte sntr srcc srct srde srec sres srfc srnn srsd srtr sscc ssce sscs ssdc ssdd ssdf ssec ssee sses sset ssfc ssfl sslc ssle sslt ssns ssrc ssrl ssrs sssc sssf ssss sstc sstd sstl ssts stcc stcs stds stec sted stee stef stel sten ster stes stet stfc stfn stlc stld stle stln stlt stnd stnn stnr stns strc strd stre strn strs stsf stss sttc sttd sttr tccc tcdd tcfc tcnn tctc tcts tdes tdff tdls tdse tdss tecl tecr tecs tect tedd tede teds teec teed teef teel teen teer tees teet tefc teff tefl teft tel- telc teld tele tell teln tels telt tenc tend tene tenn tens tent ter- terc tere terf tern terr ters tesc tesd tese tesl tess test tete tetr tets tett tfdc tfec tfrs tfsd tfss tftc tldr tlen tlrs tncc tndd tndf tnef tnes tnfc tnfl tnts trcc trcl tre- trec tred tree tref tren tres tret trfc trfd trfr trsd trst trtc trte trtr tscc tsec tsen tses tset tsfc tsfl tsse tssf tssr tsst tstc tsts ttcn tten tter ttfc ttff ttfn ttss tttt