c-- ccc cce cch cck ccl ccs ce- cec cee ceh cek cel ces ch- chc che chh chk chl chs ckc ckh cks cl- clc cle clh clk cll cls csc cse csh csk csl css ec- ecc ece ech eck ecl ecs eec eee eek eel ees ehc ehe ehh ehl ehs ekc eke ekh ekl eks elc ele elh elk ell els es- esc ese esh esk esl ess hcc hce hch hck hcl hcs he- hec hee heh hek hel hes hhc hhe hhh hhk hhl hhs hkh hkk hkl hks hlc hle hlh hll hls hsc hse hsh hsk hsl hss kcc kce kch kck kcl kcs ke- kec kee keh kek kel kes khe khh khk khs kkc kke kkh kkk kkl kks kl- klc klh kls ksc kse ksh ksk ksl kss lcc lce lch lck lcl lcs lec lee leh lek lel les lhc lhh lhk lhs lkh lkl lks llc lle llk lll lls lsc lse lsh lsk lsl lss scc sce sch sck scl scs se- sec see seh sek sel ses sh- shc she shh shk shl shs sk- skc ske skh skk skl sks slc sle slh slk sll sls ss- ssc sse ssh ssk ssl sss