c-- ccc cce cck ccm cco cct ce- cec cee cek cem ceo cet ckc ckm cko ckt cmc cme cmk cmm cmo cmt co- coc coe cok com coo cot ctc cte ctk ctm cto ctt ec- ecc ece eck ecm eco ect eec eee eek eem eeo eet ekc eke eko ekt em- emc eme emk emm emo emt eo- eoc eoe eok eom eoo eot etc ete etk etm eto ett k-t kcc kce kck kcm kct ke- kec kee kek kem keo ket kkc kke kkk kkm kkt kmc kme kmk kmm kmo kmt koc koe kok kom koo kot ktc kte ktk ktm kto ktt m-o mc- mcc mce mck mcm mco mct mec mee mek mem meo met mkc mke mkk mkm mko mkt mmc mme mmk mmm mmo mmt moc moe mok mom moo mot mtc mte mtk mtm mto mtt oc- occ ock ocm oco oct oec oee oem oeo oet okc oke okk oko om- omc ome omm omo omt oo- ooc ook oom ooo oot ot- otc ote otk otm oto ott tcc tce tck tcm tco tct te- tec tee tek tem teo tet tkc tke tkk tkm tko tkt tmc tme tmk tmm tmo tmt to- toc toe tok tom too tot ttc tte ttk ttm tto ttt