c-- ccc cce ccl ccn ccs cct ce- cec cee cel cen ces cet cl- clc cle cll cln cls clt cn- cnc cne cnl cnn cns cnt csc cse csl csn css cst ctc cte ctl ctn cts ctt ec- ecc ece ecl ecn ecs ect eec eee eel een ees eet elc ele ell eln els elt en- enc ene enl enn ens ent es- esc ese esl esn ess est etc ete etl etn ets ett lcc lce lcl lcn lcs lct lec lee lel len les let llc lle lll lln lls llt lnc lne lnl lnn lns lnt lsc lse lsl lsn lss lst ltc lte ltl lts ltt ncc nce ncl ncn ncs nct ne- nec nee nel nen nes net nlc nle nll nln nls nlt nnc nne nnl nnn nns nnt nsc nse nsl nsn nss nst ntc nte ntn nts ntt scc sce scl scn scs sct se- sec see sel sen ses set slc sle sll sln sls slt snc sne snl snn sns snt ss- ssc sse ssl ssn sss sst stc ste stl stn sts stt tcc tce tcl tcn tcs tct te- tec tee tel ten tes tet tlc tle tll tln tls tlt tnc tne tnl tnn tns tnt tsc tse tsl tsn tss tst ttc tte ttl ttn tts ttt