c-- ccc cce ccf ccg ccn cco ccs ce- cec cee cef ceg cen ceo ces cfc cfe cff cfg cfn cfo cfs cgc cge cgg cgn cgo cgs cn- cnc cne cnf cng cnn cno cns co- coc coe cof cog con coo cos csc cse csf csg csn cso css ec- ecc ece ecf ecg ecn eco ecs eec eee eef eeg een eeo ees ef- efc efe eff efg efo efs egc ege egf egg egn ego egs en- enc ene enf eng enn eno ens eo- eoc eoe eof eog eon eoo eos es- esc ese esf esg esn eso ess fcc fce fcf fcg fcn fco fcs fec fee fef feg fen feo fes ffc ffe fff ffg ffn ffo ffs fgc fge fgf fgg fgn fgs fnc fne fnf fng fnn fns foc foe fof fog fon foo fos fsc fse fsf fsg fsn fso fss gcc gce gcf gcg gcn gco gcs ge- gec gee gef geg gen geo ges gfc gfe gff gfo gfs ggc ggg ggn ggo ggs gnc gne gnf gnn gno gns goc goe gof gog gon goo gos gsc gse gsf gsg gsn gso gss ncc nce ncf ncg ncn nco ncs ne- nec nee nef neg nen neo nes nfc nfe nff nfn nfo nfs ngc nge ngf ngg ngn ngo ngs nnc nne nnf nng nnn nno nns no- noc noe nof nog non noo nos nsc nse nsf nsg nsn nso nss oc- occ ocf ocg ocn oco ocs oec oee oef oeg oen oeo oes of- ofc ofe off ofg ofn ofo ofs ogc oge ogf ogg ogn ogo ogs on- onc one onf ong onn ono ons oo- ooc oof oog oon ooo oos os- osc ose osf osg osn oso oss scc sce scf scg scn sco scs se- sec see sef seg sen seo ses sfc sfe sff sfg sfn sfo sfs sgc sge sgf sgg sgn sgo sgs snc sne snf sng snn sno sns soc soe sof sog son soo sos ss- ssc sse ssf ssg ssn sso sss