cccc cccl cccs cclc ccls ccsl ccss ccst cctc cctl cctt clsc cltc clts cly- cscc cscl cscs cstc csts csys ctls ctsc ctss ctts cyc- cycc cycl cycs cyl- cylc cyll cyls cyst cyt- cyy- cyyc lccc lccs lcls lcsc lctl lcts llcc llcs lllc llll lscs lsts ltcc ltcs lttc lyc- lyly lys- lysl lyss lyst lytt sccc sccl sccs scct sccy scl- sclc scls scsc scsl scst sctc sctl scts slcc slsc slst slts slys sscc sscs sslc sslt sssc ssss sstc sstl ssts stcc stcs stlc stlt stss sttc styl stys syl- syll syls sylt syss syst sytt tccc tctc tcts tscc tsst tstc tsts tsys ttss tttt ttyl ttys tyl- tyll tyss tyst tytt tyty yccc yctc ylls yyyy