c-- ccc cce ccf cch ccl ccs ce- cec cee cef ceh cel ces cfc cfe cff cfh cfl cfs ch- chc che chf chh chl chs cl- clc cle clf clh cll cls csc cse csf csh csl css ec- ecc ece ecf ech ecl ecs eec eee eef eel ees ef- efc efe eff efh efl efs ehc ehe ehf ehh ehl ehs elc ele elf elh ell els es- esc ese esf esh esl ess fcc fce fcf fcl fcs fec fee fef feh fel fes ffc ffe fff ffh ffl ffs fhc fhe fhf fhh fhl fhs flc fle flf fll fls fsc fse fsf fsh fsl fss hcc hce hcf hch hcl hcs he- hec hee hef heh hel hes hfc hfe hff hfh hfl hfs hhc hhe hhf hhh hhl hhs hlc hle hlf hlh hll hls hsc hse hsf hsh hsl hss lcc lce lcf lch lcl lcs lec lee lef leh lel les lfc lfe lff lfh lfl lfs lhc lhf lhh lhs llc lle llf lll lls lsc lse lsf lsh lsl lss scc sce scf sch scl scs se- sec see sef seh sel ses sfc sfe sff sfh sfl sfs sh- shc she shf shh shl shs slc sle slf slh sll sls ss- ssc sse ssf ssh ssl sss