c-- ccc cce ccf ccg ccl ccs ce- cec cee cef ceg cel ces cfc cfe cff cfg cfl cfs cgc cge cgg cgl cgs cl- clc cle clf clg cll cls csc cse csf csg csl css ec- ecc ece ecf ecg ecl ecs eec eee eef eeg eel ees ef- efc efe eff efg efl efs egc ege egf egg egl egs elc ele elf elg ell els es- esc ese esf esg esl ess fcc fce fcf fcg fcl fcs fec fee fef feg fel fes ffc ffe fff ffg ffl ffs fgc fge fgf fgg fgl fgs flc fle flf flg fll fls fsc fse fsf fsg fsl fss gcc gce gcf gcg gcl gcs ge- gec gee gef geg gel ges gfc gfe gff gfl gfs ggc ggg ggs glc gle glf glg gll gls gsc gse gsf gsg gsl gss lcc lce lcf lcg lcl lcs lec lee lef leg lel les lfc lfe lff lfg lfl lfs lgc lge lgf lgg lgl lgs llc lle llf llg lll lls lsc lse lsf lsg lsl lss scc sce scf scg scl scs se- sec see sef seg sel ses sfc sfe sff sfg sfl sfs sgc sge sgf sgg sgl sgs slc sle slf slg sll sls ss- ssc sse ssf ssg ssl sss